diff --git a/yarn.lock b/yarn.lock
index 98d4f85..03d0c03 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -93,14 +93,10 @@ acorn@^3.0.4:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
 
-acorn@^5.0.0, acorn@^5.3.0:
+acorn@^5.0.0, acorn@^5.3.0, acorn@^5.5.0:
   version "5.5.3"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
 
-acorn@^5.2.1:
-  version "5.2.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.2.1.tgz#317ac7821826c22c702d66189ab8359675f135d7"
-
 agent-base@^4.1.0:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.1.2.tgz#80fa6cde440f4dcf9af2617cf246099b5d99f0c8"
@@ -1290,9 +1286,9 @@ doctrine@1.5.0:
     esutils "^2.0.2"
     isarray "^1.0.0"
 
-doctrine@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.0.2.tgz#68f96ce8efc56cc42651f1faadb4f175273b0075"
+doctrine@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.1.0.tgz#5cd01fc101621b42c4cd7f5d1a66243716d3f39d"
   dependencies:
     esutils "^2.0.2"
 
@@ -1411,9 +1407,9 @@ eslint-visitor-keys@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
 
-eslint@^4.15.0:
-  version "4.15.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.15.0.tgz#89ab38c12713eec3d13afac14e4a89e75ef08145"
+eslint@^4.15.0, eslint@^4.5.0:
+  version "4.19.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.19.1.tgz#32d1d653e1d90408854bfb296f076ec7e186a300"
   dependencies:
     ajv "^5.3.0"
     babel-code-frame "^6.22.0"
@@ -1421,10 +1417,10 @@ eslint@^4.15.0:
     concat-stream "^1.6.0"
     cross-spawn "^5.1.0"
     debug "^3.1.0"
-    doctrine "^2.0.2"
+    doctrine "^2.1.0"
     eslint-scope "^3.7.1"
     eslint-visitor-keys "^1.0.0"
-    espree "^3.5.2"
+    espree "^3.5.4"
     esquery "^1.0.0"
     esutils "^2.0.2"
     file-entry-cache "^2.0.0"
@@ -1446,60 +1442,19 @@ eslint@^4.15.0:
     path-is-inside "^1.0.2"
     pluralize "^7.0.0"
     progress "^2.0.0"
+    regexpp "^1.0.1"
     require-uncached "^1.0.3"
     semver "^5.3.0"
     strip-ansi "^4.0.0"
     strip-json-comments "~2.0.1"
-    table "^4.0.1"
+    table "4.0.2"
     text-table "~0.2.0"
 
-eslint@^4.5.0:
-  version "4.13.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.13.0.tgz#1991aa359586af83877bde59de9d41f53e20826d"
+espree@^3.5.4:
+  version "3.5.4"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.4.tgz#b0f447187c8a8bed944b815a660bddf5deb5d1a7"
   dependencies:
-    ajv "^5.3.0"
-    babel-code-frame "^6.22.0"
-    chalk "^2.1.0"
-    concat-stream "^1.6.0"
-    cross-spawn "^5.1.0"
-    debug "^3.0.1"
-    doctrine "^2.0.2"
-    eslint-scope "^3.7.1"
-    espree "^3.5.2"
-    esquery "^1.0.0"
-    estraverse "^4.2.0"
-    esutils "^2.0.2"
-    file-entry-cache "^2.0.0"
-    functional-red-black-tree "^1.0.1"
-    glob "^7.1.2"
-    globals "^11.0.1"
-    ignore "^3.3.3"
-    imurmurhash "^0.1.4"
-    inquirer "^3.0.6"
-    is-resolvable "^1.0.0"
-    js-yaml "^3.9.1"
-    json-stable-stringify-without-jsonify "^1.0.1"
-    levn "^0.3.0"
-    lodash "^4.17.4"
-    minimatch "^3.0.2"
-    mkdirp "^0.5.1"
-    natural-compare "^1.4.0"
-    optionator "^0.8.2"
-    path-is-inside "^1.0.2"
-    pluralize "^7.0.0"
-    progress "^2.0.0"
-    require-uncached "^1.0.3"
-    semver "^5.3.0"
-    strip-ansi "^4.0.0"
-    strip-json-comments "~2.0.1"
-    table "^4.0.1"
-    text-table "~0.2.0"
-
-espree@^3.5.2:
-  version "3.5.2"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.2.tgz#756ada8b979e9dcfcdb30aad8d1a9304a905e1ca"
-  dependencies:
-    acorn "^5.2.1"
+    acorn "^5.5.0"
     acorn-jsx "^3.0.0"
 
 esprima@^3.1.3:
@@ -3491,6 +3446,10 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
+regexpp@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-1.1.0.tgz#0e3516dd0b7904f413d2d4193dce4618c3a689ab"
+
 regexpu-core@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-2.0.0.tgz#49d038837b8dcf8bfa5b9a42139938e6ea2ae240"
@@ -3968,7 +3927,7 @@ symbol-tree@^3.2.2:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
 
-table@^4.0.1, table@^4.0.2:
+table@4.0.2, table@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/table/-/table-4.0.2.tgz#a33447375391e766ad34d3486e6e2aedc84d2e36"
   dependencies: