update karma browsers

Author: 902seanryan

dist/SpringRoll-Container-umd.js

@@ -29,10 +29,10 @@
     "karma-babel-preprocessor": "^8.0.0",
     "karma-browserstack-launcher": "^1.5.1",
     "karma-chai": "^0.1.0",
-    "karma-chrome-launcher": "^2.2.0",
+    "karma-chrome-launcher": "^3.2.0",
     "karma-cli": "^2.0.0",
     "karma-es6-shim": "^1.0.0",
-    "karma-firefox-launcher": "^1.1.0",
+    "karma-firefox-launcher": "^2.1.3",
     "karma-html": "^1.0.5",
     "karma-mocha": "^2.0.1",
     "karma-requirejs": "^1.1.0",