Merge pull request #1431 from Tencent/dev

v2.0.1

update flutter for v1.3.11

Merge pull request #1409 from Tencent/dev

mmkv_ios: 1.0.7

Merge pull request #1369 from Tencent/1.3.x_lts

1.3.x lts

Merge pull request #1344 from Tencent/dev

looks like we still need v1.3.7 for CocoaPods

Merge pull request #1341 from Tencent/dev

ignore Podfile.lock

Merge pull request #1277 from Tencent/dev

Dev

Merge pull request #1255 from Tencent/dev

remove duplicate info.plist

Merge pull request #1231 from Tencent/dev

update flutter for v1.3.3

Merge pull request #1198 from Tencent/dev

prepare for flutter