diff --git a/package.json b/package.json
index 29747a9..17c5566 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "@aureooms/js-red-black-tree": "9.0.0",
     "@aureooms/js-type": "1.0.4",
     "@babel/core": "7.14.3",
-    "@babel/preset-env": "7.14.2",
+    "@babel/preset-env": "7.14.4",
     "@babel/register": "7.13.16",
     "@commitlint/cli": "12.1.4",
     "@js-library/commitlint-config": "0.0.4",
diff --git a/yarn.lock b/yarn.lock
index 8be153e..faad9b2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -93,10 +93,10 @@
   resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.13.8.tgz#5b783b9808f15cef71547f1b691f34f8ff6003a6"
   integrity sha512-EaI33z19T4qN3xLXsGf48M2cDqa6ei9tPZlfLdb2HC+e/cFtREiRd8hdSqDbwdLB0/+gLwqJmCYASH0z2bUdog==
 
-"@babel/compat-data@^7.14.0":
-  version "7.14.0"
-  resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.14.0.tgz#a901128bce2ad02565df95e6ecbf195cf9465919"
-  integrity sha512-vu9V3uMM/1o5Hl5OekMUowo3FqXLJSw+s+66nt0fSWVWTtmosdzn45JHOB3cPtZoe6CTBDzvSw0RdOY85Q37+Q==
+"@babel/compat-data@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.14.4.tgz#45720fe0cecf3fd42019e1d12cc3d27fadc98d58"
+  integrity sha512-i2wXrWQNkH6JplJQGn3Rd2I4Pij8GdHkXwHMxm+zV5YG/Jci+bCNrWZEWC4o+umiDkRrRs4dVzH3X4GP7vyjQQ==
 
 "@babel/core@7.14.3":
   version "7.14.3"
@@ -284,6 +284,16 @@
     browserslist "^4.14.5"
     semver "^6.3.0"
 
+"@babel/helper-compilation-targets@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/helper-compilation-targets/-/helper-compilation-targets-7.14.4.tgz#33ebd0ffc34248051ee2089350a929ab02f2a516"
+  integrity sha512-JgdzOYZ/qGaKTVkn5qEDV/SXAh8KcyUVkCoSWGN8T3bwrgd6m+/dJa2kVGi6RJYJgEYPBdZ84BZp9dUjNWkBaA==
+  dependencies:
+    "@babel/compat-data" "^7.14.4"
+    "@babel/helper-validator-option" "^7.12.17"
+    browserslist "^4.16.6"
+    semver "^6.3.0"
+
 "@babel/helper-create-class-features-plugin@^7.12.1":
   version "7.13.11"
   resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.13.11.tgz#30d30a005bca2c953f5653fc25091a492177f4f6"
@@ -318,6 +328,18 @@
     "@babel/helper-replace-supers" "^7.13.12"
     "@babel/helper-split-export-declaration" "^7.12.13"
 
+"@babel/helper-create-class-features-plugin@^7.14.3":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.14.4.tgz#abf888d836a441abee783c75229279748705dc42"
+  integrity sha512-idr3pthFlDCpV+p/rMgGLGYIVtazeatrSOQk8YzO2pAepIjQhCN3myeihVg58ax2bbbGK9PUE1reFi7axOYIOw==
+  dependencies:
+    "@babel/helper-annotate-as-pure" "^7.12.13"
+    "@babel/helper-function-name" "^7.14.2"
+    "@babel/helper-member-expression-to-functions" "^7.13.12"
+    "@babel/helper-optimise-call-expression" "^7.12.13"
+    "@babel/helper-replace-supers" "^7.14.4"
+    "@babel/helper-split-export-declaration" "^7.12.13"
+
 "@babel/helper-create-regexp-features-plugin@^7.12.1":
   version "7.12.7"
   resolved "https://registry.yarnpkg.com/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.12.7.tgz#2084172e95443fa0a09214ba1bb328f9aea1278f"
@@ -555,6 +577,16 @@
     "@babel/traverse" "^7.13.0"
     "@babel/types" "^7.13.12"
 
+"@babel/helper-replace-supers@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.14.4.tgz#b2ab16875deecfff3ddfcd539bc315f72998d836"
+  integrity sha512-zZ7uHCWlxfEAAOVDYQpEf/uyi1dmeC7fX4nCf2iz9drnCwi1zvwXL3HwWWNXUQEJ1k23yVn3VbddiI9iJEXaTQ==
+  dependencies:
+    "@babel/helper-member-expression-to-functions" "^7.13.12"
+    "@babel/helper-optimise-call-expression" "^7.12.13"
+    "@babel/traverse" "^7.14.2"
+    "@babel/types" "^7.14.4"
+
 "@babel/helper-simple-access@^7.12.13":
   version "7.12.13"
   resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.12.13.tgz#8478bcc5cacf6aa1672b251c1d2dde5ccd61a6c4"
@@ -727,11 +759,12 @@
     "@babel/helper-create-class-features-plugin" "^7.13.0"
     "@babel/helper-plugin-utils" "^7.13.0"
 
-"@babel/plugin-proposal-class-static-block@^7.13.11":
-  version "7.13.11"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-static-block/-/plugin-proposal-class-static-block-7.13.11.tgz#6fcbba4a962702c17e5371a0c7b39afde186d703"
-  integrity sha512-fJTdFI4bfnMjvxJyNuaf8i9mVcZ0UhetaGEUHaHV9KEnibLugJkZAtXikR8KcYj+NYmI4DZMS8yQAyg+hvfSqg==
+"@babel/plugin-proposal-class-static-block@^7.14.3":
+  version "7.14.3"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-static-block/-/plugin-proposal-class-static-block-7.14.3.tgz#5a527e2cae4a4753119c3a3e7f64ecae8ccf1360"
+  integrity sha512-HEjzp5q+lWSjAgJtSluFDrGGosmwTgKwCXdDQZvhKsRlwv3YdkUEqxNrrjesJd+B9E9zvr1PVPVBvhYZ9msjvQ==
   dependencies:
+    "@babel/helper-create-class-features-plugin" "^7.14.3"
     "@babel/helper-plugin-utils" "^7.13.0"
     "@babel/plugin-syntax-class-static-block" "^7.12.13"
 
@@ -842,13 +875,13 @@
     "@babel/plugin-syntax-object-rest-spread" "^7.8.3"
     "@babel/plugin-transform-parameters" "^7.13.0"
 
-"@babel/plugin-proposal-object-rest-spread@^7.14.2":
-  version "7.14.2"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.14.2.tgz#e17d418f81cc103fedd4ce037e181c8056225abc"
-  integrity sha512-hBIQFxwZi8GIp934+nj5uV31mqclC1aYDhctDu5khTi9PCCUOczyy0b34W0oE9U/eJXiqQaKyVsmjeagOaSlbw==
+"@babel/plugin-proposal-object-rest-spread@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.14.4.tgz#0e2b4de419915dc0b409378e829412e2031777c4"
+  integrity sha512-AYosOWBlyyXEagrPRfLJ1enStufsr7D1+ddpj8OLi9k7B6+NdZ0t/9V7Fh+wJ4g2Jol8z2JkgczYqtWrZd4vbA==
   dependencies:
-    "@babel/compat-data" "^7.14.0"
-    "@babel/helper-compilation-targets" "^7.13.16"
+    "@babel/compat-data" "^7.14.4"
+    "@babel/helper-compilation-targets" "^7.14.4"
     "@babel/helper-plugin-utils" "^7.13.0"
     "@babel/plugin-syntax-object-rest-spread" "^7.8.3"
     "@babel/plugin-transform-parameters" "^7.14.2"
@@ -1070,10 +1103,10 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.12.13"
 
-"@babel/plugin-transform-block-scoping@^7.14.2":
-  version "7.14.2"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.14.2.tgz#761cb12ab5a88d640ad4af4aa81f820e6b5fdf5c"
-  integrity sha512-neZZcP19NugZZqNwMTH+KoBjx5WyvESPSIOQb4JHpfd+zPfqcH65RMu5xJju5+6q/Y2VzYrleQTr+b6METyyxg==
+"@babel/plugin-transform-block-scoping@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.14.4.tgz#caf140b0b2e2462c509553d140e6d0abefb61ed8"
+  integrity sha512-5KdpkGxsZlTk+fPleDtGKsA+pon28+ptYmMO8GBSa5fHERCJWAzj50uAfCKBqq42HO+Zot6JF1x37CRprwmN4g==
   dependencies:
     "@babel/helper-plugin-utils" "^7.13.0"
 
@@ -1090,16 +1123,16 @@
     "@babel/helper-split-export-declaration" "^7.12.13"
     globals "^11.1.0"
 
-"@babel/plugin-transform-classes@^7.14.2":
-  version "7.14.2"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-classes/-/plugin-transform-classes-7.14.2.tgz#3f1196c5709f064c252ad056207d87b7aeb2d03d"
-  integrity sha512-7oafAVcucHquA/VZCsXv/gmuiHeYd64UJyyTYU+MPfNu0KeNlxw06IeENBO8bJjXVbolu+j1MM5aKQtH1OMCNg==
+"@babel/plugin-transform-classes@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-classes/-/plugin-transform-classes-7.14.4.tgz#a83c15503fc71a0f99e876fdce7dadbc6575ec3a"
+  integrity sha512-p73t31SIj6y94RDVX57rafVjttNr8MvKEgs5YFatNB/xC68zM3pyosuOEcQmYsYlyQaGY9R7rAULVRcat5FKJQ==
   dependencies:
     "@babel/helper-annotate-as-pure" "^7.12.13"
     "@babel/helper-function-name" "^7.14.2"
     "@babel/helper-optimise-call-expression" "^7.12.13"
     "@babel/helper-plugin-utils" "^7.13.0"
-    "@babel/helper-replace-supers" "^7.13.12"
+    "@babel/helper-replace-supers" "^7.14.4"
     "@babel/helper-split-export-declaration" "^7.12.13"
     globals "^11.1.0"
 
@@ -1117,10 +1150,10 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.13.0"
 
-"@babel/plugin-transform-destructuring@^7.13.17":
-  version "7.13.17"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.13.17.tgz#678d96576638c19d5b36b332504d3fd6e06dea27"
-  integrity sha512-UAUqiLv+uRLO+xuBKKMEpC+t7YRNVRqBsWWq1yKXbBZBje/t3IXCiSinZhjn/DC3qzBfICeYd2EFGEbHsh5RLA==
+"@babel/plugin-transform-destructuring@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.14.4.tgz#acbec502e9951f30f4441eaca1d2f29efade59ed"
+  integrity sha512-JyywKreTCGTUsL1OKu1A3ms/R1sTP0WxbpXlALeGzF53eB3bxtNkYdMj9SDgK7g6ImPy76J5oYYKoTtQImlhQA==
   dependencies:
     "@babel/helper-plugin-utils" "^7.13.0"
 
@@ -1405,26 +1438,26 @@
     "@babel/helper-create-regexp-features-plugin" "^7.12.13"
     "@babel/helper-plugin-utils" "^7.12.13"
 
-"@babel/preset-env@7.14.2":
-  version "7.14.2"
-  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.14.2.tgz#e80612965da73579c84ad2f963c2359c71524ed5"
-  integrity sha512-7dD7lVT8GMrE73v4lvDEb85cgcQhdES91BSD7jS/xjC6QY8PnRhux35ac+GCpbiRhp8crexBvZZqnaL6VrY8TQ==
+"@babel/preset-env@7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.14.4.tgz#73fc3228c59727e5e974319156f304f0d6685a2d"
+  integrity sha512-GwMMsuAnDtULyOtuxHhzzuSRxFeP0aR/LNzrHRzP8y6AgDNgqnrfCCBm/1cRdTU75tRs28Eh76poHLcg9VF0LA==
   dependencies:
-    "@babel/compat-data" "^7.14.0"
-    "@babel/helper-compilation-targets" "^7.13.16"
+    "@babel/compat-data" "^7.14.4"
+    "@babel/helper-compilation-targets" "^7.14.4"
     "@babel/helper-plugin-utils" "^7.13.0"
     "@babel/helper-validator-option" "^7.12.17"
     "@babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining" "^7.13.12"
     "@babel/plugin-proposal-async-generator-functions" "^7.14.2"
     "@babel/plugin-proposal-class-properties" "^7.13.0"
-    "@babel/plugin-proposal-class-static-block" "^7.13.11"
+    "@babel/plugin-proposal-class-static-block" "^7.14.3"
     "@babel/plugin-proposal-dynamic-import" "^7.14.2"
     "@babel/plugin-proposal-export-namespace-from" "^7.14.2"
     "@babel/plugin-proposal-json-strings" "^7.14.2"
     "@babel/plugin-proposal-logical-assignment-operators" "^7.14.2"
     "@babel/plugin-proposal-nullish-coalescing-operator" "^7.14.2"
     "@babel/plugin-proposal-numeric-separator" "^7.14.2"
-    "@babel/plugin-proposal-object-rest-spread" "^7.14.2"
+    "@babel/plugin-proposal-object-rest-spread" "^7.14.4"
     "@babel/plugin-proposal-optional-catch-binding" "^7.14.2"
     "@babel/plugin-proposal-optional-chaining" "^7.14.2"
     "@babel/plugin-proposal-private-methods" "^7.13.0"
@@ -1447,10 +1480,10 @@
     "@babel/plugin-transform-arrow-functions" "^7.13.0"
     "@babel/plugin-transform-async-to-generator" "^7.13.0"
     "@babel/plugin-transform-block-scoped-functions" "^7.12.13"
-    "@babel/plugin-transform-block-scoping" "^7.14.2"
-    "@babel/plugin-transform-classes" "^7.14.2"
+    "@babel/plugin-transform-block-scoping" "^7.14.4"
+    "@babel/plugin-transform-classes" "^7.14.4"
     "@babel/plugin-transform-computed-properties" "^7.13.0"
-    "@babel/plugin-transform-destructuring" "^7.13.17"
+    "@babel/plugin-transform-destructuring" "^7.14.4"
     "@babel/plugin-transform-dotall-regex" "^7.12.13"
     "@babel/plugin-transform-duplicate-keys" "^7.12.13"
     "@babel/plugin-transform-exponentiation-operator" "^7.12.13"
@@ -1477,7 +1510,7 @@
     "@babel/plugin-transform-unicode-escapes" "^7.12.13"
     "@babel/plugin-transform-unicode-regex" "^7.12.13"
     "@babel/preset-modules" "^0.1.4"
-    "@babel/types" "^7.14.2"
+    "@babel/types" "^7.14.4"
     babel-plugin-polyfill-corejs2 "^0.2.0"
     babel-plugin-polyfill-corejs3 "^0.2.0"
     babel-plugin-polyfill-regenerator "^0.2.0"
@@ -1749,6 +1782,14 @@
     "@babel/helper-validator-identifier" "^7.14.0"
     to-fast-properties "^2.0.0"
 
+"@babel/types@^7.14.4":
+  version "7.14.4"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.14.4.tgz#bfd6980108168593b38b3eb48a24aa026b919bc0"
+  integrity sha512-lCj4aIs0xUefJFQnwwQv2Bxg7Omd6bgquZ6LGC+gGMh6/s5qDVfjuCMlDmYQ15SLsWHd9n+X3E75lKIhl5Lkiw==
+  dependencies:
+    "@babel/helper-validator-identifier" "^7.14.0"
+    to-fast-properties "^2.0.0"
+
 "@bcoe/v8-coverage@^0.2.3":
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz#75a2e8b51cb758a7553d6804a5932d7aace75c39"
@@ -3064,6 +3105,17 @@ browserslist@^4.14.5:
     escalade "^3.1.1"
     node-releases "^1.1.67"
 
+browserslist@^4.16.6:
+  version "4.16.6"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.6.tgz#d7901277a5a88e554ed305b183ec9b0c08f66fa2"
+  integrity sha512-Wspk/PqO+4W9qp5iUTJsa1B/QrYn1keNCcEP5OvP7WBwT4KaDly0uONYmC6Xa3Z5IqnUgS0KcgLYu1l74x0ZXQ==
+  dependencies:
+    caniuse-lite "^1.0.30001219"
+    colorette "^1.2.2"
+    electron-to-chromium "^1.3.723"
+    escalade "^3.1.1"
+    node-releases "^1.1.71"
+
 buf-compare@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/buf-compare/-/buf-compare-1.0.1.tgz#fef28da8b8113a0a0db4430b0b6467b69730b34a"
@@ -3282,6 +3334,11 @@ caniuse-lite@^1.0.30001181:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001191.tgz#bacb432b6701f690c8c5f7c680166b9a9f0843d9"
   integrity sha512-xJJqzyd+7GCJXkcoBiQ1GuxEiOBCLQ0aVW9HMekifZsAVGdj5eJ4mFB9fEhSHipq9IOk/QXFJUiIr9lZT+EsGw==
 
+caniuse-lite@^1.0.30001219:
+  version "1.0.30001230"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001230.tgz#8135c57459854b2240b57a4a6786044bdc5a9f71"
+  integrity sha512-5yBd5nWCBS+jWKTcHOzXwo5xzcj4ePE/yjtkZyUV1BTUmrBaA9MRGC+e7mxnqXSA90CmCA8L3eKLaSUkt099IQ==
+
 caseless@~0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
@@ -4413,6 +4470,11 @@ electron-to-chromium@^1.3.649:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.672.tgz#3a6e335016dab4bc584d5292adc4f98f54541f6a"
   integrity sha512-gFQe7HBb0lbOMqK2GAS5/1F+B0IMdYiAgB9OT/w1F4M7lgJK2aNOMNOM622aEax+nS1cTMytkiT0uMOkbtFmHw==
 
+electron-to-chromium@^1.3.723:
+  version "1.3.741"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.741.tgz#dc1024b19b31e27fb2c8c0a1f120cb05fc6ca695"
+  integrity sha512-4i3T0cwnHo1O4Mnp9JniEco8bZiXoqbm3PhW5hv7uu8YLg35iajYrRnNyKFaN8/8SSTskU2hYqVTeYVPceSpUA==
+
 elegant-spinner@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/elegant-spinner/-/elegant-spinner-1.0.1.tgz#db043521c95d7e303fd8f345bedc3349cfb0729e"
@@ -7810,6 +7872,11 @@ node-releases@^1.1.70:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.70.tgz#66e0ed0273aa65666d7fe78febe7634875426a08"
   integrity sha512-Slf2s69+2/uAD79pVVQo8uSiC34+g8GWY8UH2Qtqv34ZfhYrxpYpfzs9Js9d6O0mbDmALuxaTlplnBTnSELcrw==
 
+node-releases@^1.1.71:
+  version "1.1.72"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.72.tgz#14802ab6b1039a79a0c7d662b610a5bbd76eacbe"
+  integrity sha512-LLUo+PpH3dU6XizX3iVoubUNheF/owjXCZZ5yACDxNnPtgFuludV1ZL3ayK1kVep42Rmm0+R9/Y60NQbZ2bifw==
+
 normalize-package-data@^2.3.2, normalize-package-data@^2.5.0:
   version "2.5.0"
   resolved "https://registry.yarnpkg.com/normalize-package-data/-/normalize-package-data-2.5.0.tgz#e66db1838b200c1dfc233225d12cb36520e234a8"