build: Updating mediawiki/minus-x to 0.3.2

Additional changes:
* Added .eslintcache to .gitignore.

Change-Id: Ifcd79b5966f44baae1f50144730c04d09d47f000

composer.json

@@ -28,7 +28,7 @@
 		"jakub-onderka/php-parallel-lint": "1.0.0",
 		"mediawiki/mediawiki-codesniffer": "28.0.0",
 		"jakub-onderka/php-console-highlighter": "0.3.2",
-		"mediawiki/minus-x": "0.3.1",
+		"mediawiki/minus-x": "0.3.2",
 		"mediawiki/mediawiki-phan-config": "0.8.0"
 	},
 	"scripts": {