* refactor
* unit test
* govendor -> go mod (Close: #37), go 1.12.9 -> 1.13
* add Referer header, fix zhanqi tv
* Fix bilibili live resolution
Missing 1080p resolution by default since bilibili updated API according to https://github.com/streamlink/streamlink/pull/2625
* recorder manager test, refine base live, refine cache
* String Filter