Build/Tools: Update PHPCS ruleset for WP Core and related Composer setup.

`.gitignore` + `svn:ignore`:
* Add the typical filenames of overloaded PHPCS configs to `.gitignore`.

Composer:
* Use the `develop` (Packagist `dev-master`) version of WPCS as it contains lots of bugfixes.
* Remove the PHPCS dependency. This is a dependency of WPCS, not of WP Core itself. This will also make sure that the PHPCS version used is always one which is supported by WPCS.
* Refreshed the `composer.lock` file.

PHPCS ruleset:
* Removed a reference to a sniff which doesn't exist in WPCS yet.
* Use the PHPCS 3.x `basepath` option to clean up the file paths PHPCS shows in the reports.
* Use the PHPCS 3.x `parallel` option to enable parallel scanning whenever possible to speed up the scans.
* Whitelist the `wp-includes/l10n.php` file from issues being reported by the `WordPress.WP.I18n` sniff.

Fixes #44366.

git-svn-id: https://develop.svn.wordpress.org/trunk@43348 602fd350-edb4-49c9-b593-d223f7449a82

.gitignore

@@ -7,6 +7,8 @@ wp-tests-config.php
 
 # Files and folders related to build/test tools
 /phpunit.xml
+/.phpcs.xml
+/phpcs.xml
 /tests/phpunit/data/plugins/wordpress-importer
 /tests/phpunit/data/.trac-ticket-cache*
 /tests/qunit/compiled.html

composer.json

@@ -11,8 +11,7 @@
 	},
 	"require-dev": {
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.4.4",
-		"squizlabs/php_codesniffer": "^3.2.3",
-		"wp-coding-standards/wpcs": "dev-feature/new-multi-line-comment-formatting-sniffs"
+		"wp-coding-standards/wpcs": "dev-master"
 	},
 	"scripts": {
 		"format": "phpcbf --standard=phpcs.xml.dist --report-summary --report-source",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "4b409623b2bc5d8e87b7f45d57a60990",
+    "content-hash": "9c2c871b813e89682ef445611d2f5363",
     "packages": [],
     "packages-dev": [
         {
@@ -77,16 +77,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.2.3",
+            "version": "3.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "4842476c434e375f9d3182ff7b89059583aa8b27"
+                "reference": "d86873af43b4aa9d1f39a3601cc0cfcf02b25266"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/4842476c434e375f9d3182ff7b89059583aa8b27",
-                "reference": "4842476c434e375f9d3182ff7b89059583aa8b27",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/d86873af43b4aa9d1f39a3601cc0cfcf02b25266",
+                "reference": "d86873af43b4aa9d1f39a3601cc0cfcf02b25266",
                 "shasum": ""
             },
             "require": {
@@ -124,20 +124,20 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2018-02-20T21:35:23+00:00"
+            "time": "2018-06-06T23:58:19+00:00"
         },
         {
             "name": "wp-coding-standards/wpcs",
-            "version": "dev-feature/new-multi-line-comment-formatting-sniffs",
+            "version": "dev-master",
             "source": {
                 "type": "git",
                 "url": "https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards.git",
-                "reference": "ce4d719296ebbecd01f57bc3729833e89b39ad99"
+                "reference": "cf6b310caad735816caef7573295f8a534374706"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/WordPress-Coding-Standards/WordPress-Coding-Standards/zipball/ce4d719296ebbecd01f57bc3729833e89b39ad99",
-                "reference": "ce4d719296ebbecd01f57bc3729833e89b39ad99",
+                "url": "https://api.github.com/repos/WordPress-Coding-Standards/WordPress-Coding-Standards/zipball/cf6b310caad735816caef7573295f8a534374706",
+                "reference": "cf6b310caad735816caef7573295f8a534374706",
                 "shasum": ""
             },
             "require": {
@@ -164,7 +164,7 @@
                 "standards",
                 "wordpress"
             ],
-            "time": "2017-11-30T18:28:51+00:00"
+            "time": "2018-02-16T01:57:48+00:00"
         }
     ],
     "aliases": [],

phpcs.xml.dist

@@ -4,10 +4,15 @@
 
 	<rule ref="WordPress-Core"/>
 	<rule ref="WordPress.CodeAnalysis.EmptyStatement"/>
-	<rule ref="WordPress.Commenting.DocblockFormat"/>
 
 	<arg name="extensions" value="php"/>
 
+	<!-- Strip the filepaths down to the relevant bit. -->
+	<arg name="basepath" value="./"/>
+
+	<!-- Check up to 20 files simultanously. -->
+	<arg name="parallel" value="20"/>
+
 	<!-- Show sniff codes in all reports -->
 	<arg value="ps"/>
 
@@ -69,6 +74,12 @@
 		<exclude-pattern>/tests/phpunit/tests/db\.php</exclude-pattern>
 	</rule>
 
+	<!-- Whitelist the I18n functions file from issues identified by the I18n sniff
+		(such as calling the low-level translate() function). -->
+	<rule ref="WordPress.WP.I18n">
+		<exclude-pattern>/src/wp-includes/l10n\.php</exclude-pattern>
+	</rule>
+
 	<rule ref="Generic.Functions.FunctionCallArgumentSpacing">
 		<exclude-pattern>/wp-config\.php</exclude-pattern>
 		<exclude-pattern>/wp-config-sample\.php</exclude-pattern>