0.40.0: Cache vast xml (#643)

* Made some changes to support VAST cacheing.

* Implemented vastxml cacheing.

* Fixed JSON in markdown.

* Added endpoint contract tests.

* Removed redundant line.

0.39.1: Revert "Fix tagid param for Sovrn (#633)" (#635)

This reverts commit 8843c87ae6fb5f3c333234367098e2b8418007cf.

0.39.0: Fix tagid param for Sovrn (#633)

* initial checkin of sovrn adapter

* some adapter updates from testing

sort bids by price so multiple sovrn tags in a unit can function properly

* User sync url/params updates

* sovrn adapter unit tests

* Updates to pass validation

* Add Headers

* secure

* Tests for headers

* fix pixel endpoint params

* Fix test for new pixel ep

* fix test after os change

* add info.yaml

* test no cookies behavior & adapter names

* Add test for nocontent & notfound responses

* remove semicolon

* Add Sovrn adapter

Refactoring sovrn adapter to follow new OpenRtb compatibility guidelines

* Review comments

* couple more changes

* Review comments, test fixes

* format fix

* Align field names with OpenRTB spec

* Moved the info.yaml to the new spot.

* Fixed build errors.

* gdpr support for sovrn

* Delete debug

* This change, along with our internal updates should solve 574

* don't include bid in response if adm parsing errored

* Switch tagid param to lowercase, since this is what clientside uses and because its what openrtb uses.

0.38.0: Banner impression update to look for only top one (#587)

*  Banner impression update to look for only top one

* making a copy of bid request to work on

*  Copying banner object to update

*  Fixing issue with impression copy

*  Updating error statement

0.37.0

The conversant adapter apparently doesnt support apps. This makes it …

0.36.0: Commented out the broken test. (#619)

* Commented out the broken test.

* Use SkipNow() rather than commenting out the test.

0.35.3

Adding creative type check in pubmatic adapter (#601)

0.35.2: Fixing a rubicon race condition (#597)

* Added lots more race condition tests. Fixed a race condition.

* Removed a test I didnt mean to add.

0.35.1: Bump gdpr version (#591)

* Bumped the GDPR version to 0.6.1

* Bumped the go-gdpr version.

0.35.0: More granular adapter error metrics (#550)

* Split the adapter error metrics up by purpose. Fixed some bugs.

* Renamed some more metrics, and fixed some issues.

* Split the openrtb2 request type into web and app.