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

@@ -1,5 +1,8 @@
 var browsers = require('./browsers.json');
 
+var MINUTE_IN_MS = 1000 * 60
+var MAX_TIMEOUT = 2 * MINUTE_IN_MS
+
 module.exports = {
  basePath: "",
  port: 9876,
@@ -18,9 +21,9 @@ module.exports = {
  "/jquery": "/base/test/jquery"
  },
  concurrency: 1,
- captureTimeout: 100000,
- browserDisconnectTimeout: 100000,
- browserNoActivityTimeout: 100000,
+ captureTimeout: MAX_TIMEOUT,
+ browserDisconnectTimeout: MAX_TIMEOUT,
+ browserNoActivityTimeout: MAX_TIMEOUT,
  customLaunchers: browsers,
  browsers: [],
  reporters: [ "progress", "saucelabs" ],

package.json

@@ -17,7 +17,7 @@
  "types": "src/bugsnag.d.ts",
  "scripts": {
  "lint": "grunt eslint",
- "test": "karma start --single-run && karma start karma-legacy.conf.js --single-run",
+ "test": "karma start karma-legacy.conf.js --single-run && karma start --single-run",
  "test:watch": "karma start --browsers PhantomJS",
  "test:quick": "karma start --single-run --browsers PhantomJS"
  },
@@ -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",