chore(deps): bump @typescript-eslint/eslint-plugin from 2.20.0 to 2.21.0 (#6423)

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v2.21.0/packages/eslint-plugin)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

tools/cdk-build-tools/package.json

@@ -37,7 +37,7 @@
     "pkglint": "1.25.0"
   },
   "dependencies": {
-    "@typescript-eslint/eslint-plugin": "^2.20.0",
+    "@typescript-eslint/eslint-plugin": "^2.21.0",
     "@typescript-eslint/parser": "^2.19.2",
     "awslint": "1.25.0",
     "colors": "^1.4.0",

yarn.lock

@@ -2165,12 +2165,12 @@
   dependencies:
     "@types/yargs-parser" "*"
 
-"@typescript-eslint/eslint-plugin@^2.20.0":
-  version "2.20.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.20.0.tgz#a522d0e1e4898f7c9c6a8e1ed3579b60867693fa"
-  integrity sha512-cimIdVDV3MakiGJqMXw51Xci6oEDEoPkvh8ggJe2IIzcc0fYqAxOXN6Vbeanahz6dLZq64W+40iUEc9g32FLDQ==
+"@typescript-eslint/eslint-plugin@^2.21.0":
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.21.0.tgz#a34de84a0791cae0357c4dda805c5b4e8203b6c6"
+  integrity sha512-b5jjjDMxzcjh/Sbjuo7WyhrQmVJg0WipTHQgXh5Xwx10uYm6nPWqN1WGOsaNq4HR3Zh4wUx4IRQdDkCHwyewyw==
   dependencies:
-    "@typescript-eslint/experimental-utils" "2.20.0"
+    "@typescript-eslint/experimental-utils" "2.21.0"
     eslint-utils "^1.4.3"
     functional-red-black-tree "^1.0.1"
     regexpp "^3.0.0"
@@ -2185,6 +2185,15 @@
     "@typescript-eslint/typescript-estree" "2.20.0"
     eslint-scope "^5.0.0"
 
+"@typescript-eslint/experimental-utils@2.21.0":
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.21.0.tgz#71de390a3ec00b280b69138d80733406e6e86bfa"
+  integrity sha512-olKw9JP/XUkav4lq0I7S1mhGgONJF9rHNhKFn9wJlpfRVjNo3PPjSvybxEldvCXnvD+WAshSzqH5cEjPp9CsBA==
+  dependencies:
+    "@types/json-schema" "^7.0.3"
+    "@typescript-eslint/typescript-estree" "2.21.0"
+    eslint-scope "^5.0.0"
+
 "@typescript-eslint/parser@^2.19.2":
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-2.20.0.tgz#608e5bb06ba98a415b64ace994c79ab20f9772a9"
@@ -2208,6 +2217,19 @@
     semver "^6.3.0"
     tsutils "^3.17.1"
 
+"@typescript-eslint/typescript-estree@2.21.0":
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.21.0.tgz#7e4be29f2e338195a2e8c818949ed0ff727cc943"
+  integrity sha512-NC/nogZNb9IK2MEFQqyDBAciOT8Lp8O3KgAfvHx2Skx6WBo+KmDqlU3R9KxHONaijfTIKtojRe3SZQyMjr3wBw==
+  dependencies:
+    debug "^4.1.1"
+    eslint-visitor-keys "^1.1.0"
+    glob "^7.1.6"
+    is-glob "^4.0.1"
+    lodash "^4.17.15"
+    semver "^6.3.0"
+    tsutils "^3.17.1"
+
 "@zkochan/cmd-shim@^3.1.0":
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/@zkochan/cmd-shim/-/cmd-shim-3.1.0.tgz#2ab8ed81f5bb5452a85f25758eb9b8681982fd2e"