chore(karma): install fixed version

Closes #5126

package.json

@@ -32,7 +32,7 @@
     "grunt-html2js": "^0.3.0",
     "grunt-karma": "^0.12.0",
     "jasmine-core": "^2.2.0",
-    "karma": "^0.13.3",
+    "karma": "0.13.5",
     "karma-chrome-launcher": "^0.2.0",
     "karma-coverage": "^0.5.0",
     "karma-firefox-launcher": "^0.1.4",