Merge pull request pili-engineering#564 from iossun/master

Release v3.4.7

Merge pull request pili-engineering#561 from iossun/master

Release v3.4.6

Merge pull request pili-engineering#552 from Kivenhaoyu/dev-v3.4.5

dec-v3.4.5 release

Merge pull request pili-engineering#546 from Kivenhaoyu/dev-v3.4.4

update README

Merge pull request pili-engineering#487 from Kivenhaoyu/dev-3.4.3

dev 3.4.3

Merge pull request pili-engineering#475 from HeraShowFeng/v3.4.2_doc

add release v3.4.2 documents

Merge pull request pili-engineering#443 from HeraShowFeng/upload-v3.4.1

solve framework version path error in podspec

Merge pull request pili-engineering#432 from anhaoxiong/master

release v3.4.0

Merge pull request pili-engineering#413 from HeraShowFeng/update_v3.3.3

update PLPlayerKit to v3.3.3 in release

Merge pull request pili-engineering#388 from HeraShowFeng/update_v3.3.2

update PLPlayerKit sdk documents and pod to v3.3.2