Run linters against js as well.

phpcs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <ruleset name="Unsplash Coding Standards">
-	<arg name="extensions" value="php" />
+	<arg name="extensions" value="php,js,css" />
 	<arg name="colors" />
 	<arg name="parallel" value="16" />
 	<arg value="s" />
@@ -32,10 +32,17 @@
 
 	<file>.</file>
 
-	<exclude-pattern>*/assets/*</exclude-pattern>
+	<exclude-pattern>*/assets/css/*</exclude-pattern>
 	<exclude-pattern>*/bin/*</exclude-pattern>
+	<exclude-pattern>*/build/*</exclude-pattern>
 	<exclude-pattern>*/js/*</exclude-pattern>
 	<exclude-pattern>*/node_modules/*</exclude-pattern>
 	<exclude-pattern>*/tests/coverage/*</exclude-pattern>
+	<exclude-pattern>*/tests/e2e/*</exclude-pattern>
+	<exclude-pattern>*/tests/merge-coverage.js</exclude-pattern>
 	<exclude-pattern>*/vendor/*</exclude-pattern>
+	<exclude-pattern>./webpack.config.js</exclude-pattern>
+	<exclude-pattern>./postcss.config.js</exclude-pattern>
+	<exclude-pattern>./Gruntfile.js</exclude-pattern>
+	<exclude-pattern>./jest.config.js</exclude-pattern>
 </ruleset>