Pin karma dependency to version that works with old IE

As outlined in the linked issue, it looks like our loose version
range allowed a newer Karma to be install that breaks in old IEs.

Karma issue tracker link:
karma-runner/karma#2556

For now, pinning to 1.3.0 resolves a transitive dependency tree
which "works".

karma-common.js

@@ -1,7 +1,7 @@
 var browsers = require('./browsers.json');
 
 var MINUTE_IN_MS = 1000 * 60
-var MAX_TIMEOUT = MINUTE_IN_MS * 5
+var MAX_TIMEOUT = 2 * MINUTE_IN_MS
 
 module.exports = {
   basePath: "",

package.json

@@ -36,7 +36,7 @@
         "grunt-regex-replace": "~0.2.5",
         "grunt-s3": "git://github.com/pifantastic/grunt-s3",
         "gruntify-eslint": "^1.3.0",
-        "karma": "^1.3.0",
+        "karma": "1.3.0",
         "karma-coverage": "^1.1.1",
         "karma-coveralls": "^1.1.2",
         "karma-mocha-ie-legacy": "file:./test/karma-mocha",