Merge pull request Quick#1279 from Quick/mark_async_sharedExamples_as…

…_unavailable

Mark the async versions of sharedExamples as unavailable.

Version 7.5.0. Open https://github.com/Quick/Quick/releases/tag/v7.5.0 …

…for full release notes.

Version 7.4.1. Open https://github.com/Quick/Quick/releases/tag/v7.4.1 …

…for full release notes.

Version 7.4.0. Open https://github.com/Quick/Quick/releases/tag/v7.4.0 …

…for full release notes.

Version 7.3.1. Open https://github.com/Quick/Quick/releases/tag/v7.3.1 …

…for full release notes.

Version 7.3.0. Open https://github.com/Quick/Quick/releases/tag/v7.3.0 …

…for full release notes.

Version 7.2.0. Open https://github.com/Quick/Quick/releases/tag/v7.2.0 …

…for full release notes.

[v7.1.0] Update docs & podspec

[v7.0.2] Docs and Podspec

[v7.0.1] Docs and Podspec