build: Updating eslint-config-wikimedia to 0.18.2

Additional changes:
* Dropped .php5 and .inc files from .phpcs.xml (T200956).

Change-Id: I91e283fc746d1521e668e7230d0d107c1d862dfd

.phpcs.xml

@@ -2,6 +2,6 @@
 <ruleset>
 	<rule ref="./vendor/mediawiki/mediawiki-codesniffer/MediaWiki" />
 	<file>.</file>
-	<arg name="extensions" value="php,php5,inc"/>
+	<arg name="extensions" value="php"/>
 	<arg name="encoding" value="UTF-8"/>
 </ruleset>

package.json

@@ -13,7 +13,7 @@
 		"@wdio/spec-reporter": "6.10.6",
 		"@wdio/sync": "6.10.11",
 		"dotenv": "8.2.0",
-		"eslint-config-wikimedia": "0.18.1",
+		"eslint-config-wikimedia": "0.18.2",
 		"grunt": "1.3.0",
 		"grunt-banana-checker": "0.9.0",
 		"grunt-eslint": "23.0.0",