Merge pull request #201 from easemob/dev_1.2.0

Dev 1.2.0

fix bugs.

Merge pull request #179 from dujiepeng/du_new

Du new

Merge pull request #169 from luckyyuqiang/new

Replace custom MonoPInvokeCallback with AOT attribute.

Merge pull request #90 from easemob/dev

1.0.8

Merge pull request #79 from easemob/dev

update sdk to 1.0.5

Merge pull request #60 from luckyyuqiang/3.9.0.1

3.9.0.1

3.9.0

Merge pull request #56 from easemob/dev

Dev

Update README.md