build: Update linters

Change-Id: I20e4794d0f565a284917f35d15736e3f33523856

tests/qunit/.eslintrc.json

@@ -0,0 +1,9 @@
+{
+	"extends": [
+		"wikimedia/qunit",
+		"../../.eslintrc.json"
+	],
+	"env": {
+		"qunit": true
+	}
+}

tests/qunit/ext.uls.tests.js

@@ -63,7 +63,9 @@
 			assert.ok( successSave, 'Options saving API did not produce an error.' );
 			// Delete old options
 			prefs.set( prefName, undefined );
-			prefs.save( done );
+			prefs.save( function () {
+				done();
+			} );
 		} );
 	} );