Pubgears adapter tests failing in IE browser

[jaiminpanchal27]

Type of issue

Bug

Description

Pubgears adapter tests are failing in IE browsers.CustomEvent is not supported in IE browsers.

  PubGearsAdapter
    bids received
      ✗ should call bidManager.addBidResponse() when bid received
	TypeError: Object doesn't support this action
	   at Anonymous function (webpack:///test/spec/modules/pubgearsBidAdapter_spec.js:202:6 <- test/spec/modules/pubgearsBidAdapter_spec.js:2840:7)

      ✗ should send correct bid response object when receiving onBidResponse event
	TypeError: Object doesn't support this action
	   at Anonymous function (webpack:///test/spec/modules/pubgearsBidAdapter_spec.js:238:6 <- test/spec/modules/pubgearsBidAdapter_spec.js:2876:7)

      ✗ should send $0 bid as no-bid response
	TypeError: Object doesn't support this action
	   at Anonymous function (webpack:///test/spec/modules/pubgearsBidAdapter_spec.js:276:6 <- test/spec/modules/pubgearsBidAdapter_spec.js:2914:7)

Steps to reproduce

Run tests in IE.
gulp test --watch --browsers=Chrome
Copy karma url and run tests in IE.

Expected results

All tests should pass.

Actual results

Failing tests

Other information

@Walexander

[dbemiller]

Duplicates #1360