Codeclimate: rely on eslint 5 to avoid build errors (#12632)

* Codeclimate: run eslint 5

This may help solve current errors when trying to run Codeclimate tests.

* Rely on Codeclimate prepare to extract our config into base file

This will allow us to make our CodeClimate config available to other repos.

See comment at the top of the file to see how this can be used.

* Update CodeClimate base file.

See https://github.com/Automattic/jetpack/pull/12632/files#r292177003

.codeclimate.yml

@@ -1,57 +1,6 @@
 ---
-engines:
-  csslint:
-    enabled: true
-  duplication:
-    enabled: true
-    config:
-      languages:
-      - javascript
-      - php
-  fixme:
-    enabled: true
-  phpcodesniffer:
-    enabled: true
-    config:
-      standard: "WordPress"
-  phpmd:
-    enabled: true
-  eslint:
-    enabled: true
-    channel: "eslint-2"
-  scss-lint:
-    enabled: true
-  markdownlint:
-    enabled: true
-ratings:
-  paths:
-  - "**.css"
-  - "**.scss"
-  - "**.inc"
-  - "**.js"
-  - "**.jsx"
-  - "**.php"
-  - "**.md"
-exclude_paths:
-  - "**/.github/**"
-  - "**/tests/**"
-  - "**.png"
-  - "**.jpg"
-  - "**.gif"
-  - "gulpfile.js"
-  - "composer.lock"
-  - ".phpcs.xml.dist"
-  - "**.json"
-  - "**.jshintrc"
-  - "**.jshintignore"
-  - "**.svnignore"
-  - "**.travis.yml"
-  - "**.gitignore"
-  - "**.eslintrc.js"
-  - "**.editorconfig"
-  - "**.pot"
-  - "**.txt"
-  - "**-min.js"
-  - "**-min.css"
-  - "**.dist"
-  - "**.sh"
+prepare:
+  fetch:
+    - url: "https://raw.githubusercontent.com/automattic/jetpack/master/.github/codeclimate-base.yml"
+      path: "codeclimate-base.yml"
+

.github/codeclimate-base.yml

@@ -0,0 +1,69 @@
+# Basic configuration for CodeClimate.
+# This basic configuration can then be used and extended up in other repositories,
+# or in this one, using the prepare step:
+# https://docs.codeclimate.com/docs/configuring-the-prepare-step
+#
+# Here is how your codeclimate file extending Jetpack's one should look like:
+# prepare:
+# fetch:
+#   - url: "https://raw.githubusercontent.com/automattic/jetpack/master/.github/codeclimate-base.yml"
+#     path: "codeclimate-base.yml"
+---
+engines:
+  csslint:
+    enabled: true
+  duplication:
+    enabled: true
+    config:
+      languages:
+      - javascript
+      - php
+  fixme:
+    enabled: true
+  phpcodesniffer:
+    enabled: true
+    config:
+      standard: "WordPress"
+  phpmd:
+    enabled: true
+  eslint:
+    enabled: true
+    channel: "eslint-5"
+    config:
+      config: "/.eslintrc.js"
+  scss-lint:
+    enabled: true
+  markdownlint:
+    enabled: true
+ratings:
+  paths:
+  - "**.css"
+  - "**.scss"
+  - "**.inc"
+  - "**.js"
+  - "**.jsx"
+  - "**.php"
+  - "**.md"
+exclude_paths:
+  - "**/.github/**"
+  - "**/tests/**"
+  - "**.png"
+  - "**.jpg"
+  - "**.gif"
+  - "gulpfile.js"
+  - "composer.lock"
+  - ".phpcs.xml.dist"
+  - "**.json"
+  - "**.jshintrc"
+  - "**.jshintignore"
+  - "**.svnignore"
+  - "**.travis.yml"
+  - "**.gitignore"
+  - "**.eslintrc.js"
+  - "**.editorconfig"
+  - "**.pot"
+  - "**.txt"
+  - "**-min.js"
+  - "**-min.css"
+  - "**.dist"
+  - "**.sh"