Bump @typescript-eslint/eslint-plugin from 2.8.0 to 2.9.0

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 2.8.0 to 2.9.0.
- [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/v2.9.0/packages/eslint-plugin)

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

package.json

@@ -48,7 +48,7 @@
     "@types/ember__test-helpers": "^0.7.8",
     "@types/qunit": "^2.9.0",
     "@types/rsvp": "^4.0.3",
-    "@typescript-eslint/eslint-plugin": "^2.8.0",
+    "@typescript-eslint/eslint-plugin": "^2.9.0",
     "@typescript-eslint/parser": "^2.9.0",
     "babel-eslint": "^10.0.2",
     "broccoli-asset-rev": "^3.0.0",

yarn.lock

@@ -1424,26 +1424,17 @@
   resolved "https://registry.yarnpkg.com/@types/tmp/-/tmp-0.0.33.tgz#1073c4bc824754ae3d10cfab88ab0237ba964e4d"
   integrity sha1-EHPEvIJHVK49EM+riKsCN7qWTk0=
 
-"@typescript-eslint/eslint-plugin@^2.8.0":
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.8.0.tgz#eca584d46094ebebc3cb3e9fb625bfbc904a534d"
-  integrity sha512-ohqul5s6XEB0AzPWZCuJF5Fd6qC0b4+l5BGEnrlpmvXxvyymb8yw8Bs4YMF8usNAeuCJK87eFIHy8g8GFvOtGA==
+"@typescript-eslint/eslint-plugin@^2.9.0":
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.9.0.tgz#fa810282c0e45f6c2310b9c0dfcd25bff97ab7e9"
+  integrity sha512-98rfOt3NYn5Gr9wekTB8TexxN6oM8ZRvYuphPs1Atfsy419SDLYCaE30aJkRiiTCwGEY98vOhFsEVm7Zs4toQQ==
   dependencies:
-    "@typescript-eslint/experimental-utils" "2.8.0"
+    "@typescript-eslint/experimental-utils" "2.9.0"
     eslint-utils "^1.4.3"
     functional-red-black-tree "^1.0.1"
     regexpp "^3.0.0"
     tsutils "^3.17.1"
 
-"@typescript-eslint/experimental-utils@2.8.0":
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.8.0.tgz#208b4164d175587e9b03ce6fea97d55f19c30ca9"
-  integrity sha512-jZ05E4SxCbbXseQGXOKf3ESKcsGxT8Ucpkp1jiVp55MGhOvZB2twmWKf894PAuVQTCgbPbJz9ZbRDqtUWzP8xA==
-  dependencies:
-    "@types/json-schema" "^7.0.3"
-    "@typescript-eslint/typescript-estree" "2.8.0"
-    eslint-scope "^5.0.0"
-
 "@typescript-eslint/experimental-utils@2.9.0":
   version "2.9.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-2.9.0.tgz#bbe99a8d9510240c055fc4b17230dd0192ba3c7f"
@@ -1463,19 +1454,6 @@
     "@typescript-eslint/typescript-estree" "2.9.0"
     eslint-visitor-keys "^1.1.0"
 
-"@typescript-eslint/typescript-estree@2.8.0":
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.8.0.tgz#fcc3fe6532840085d29b75432c8a59895876aeca"
-  integrity sha512-ksvjBDTdbAQ04cR5JyFSDX113k66FxH1tAXmi+dj6hufsl/G0eMc/f1GgLjEVPkYClDbRKv+rnBFuE5EusomUw==
-  dependencies:
-    debug "^4.1.1"
-    eslint-visitor-keys "^1.1.0"
-    glob "^7.1.6"
-    is-glob "^4.0.1"
-    lodash.unescape "4.0.1"
-    semver "^6.3.0"
-    tsutils "^3.17.1"
-
 "@typescript-eslint/typescript-estree@2.9.0":
   version "2.9.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-2.9.0.tgz#09138daf8f47d0e494ba7db9e77394e928803017"