[revision] fix grammer, and prepare to release.

[refactor] sync

[refactor] fix test.

[debug] remove v1.1.4, rename v1.1.5.

[bug] correct version number

Merge branch 'master' into release-v1.1.2

Merge pull request #146 from SMILELab-FL/docs

Docs

v1.1 finished

Merge pull request #131 from SMILELab-FL/v1.1-dev

V1.1 dev

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