chore: adjust README for release

Merge pull request #575 from kenstir/kenstir/fix-xcode-14.3

Fix Xcode 14.3 which supports only iOS 11.0+

Merge pull request #507 from marcelofabri/marcelo/fix-compilation

Fix compilation

Merge pull request #489 from 4brunu/feature/swift-package-manager-int…

…egration

Add Swift Package Manager integration

Update README and podspec

Bumped version to 3.6.4 (readme)

Bumped version to 3.6.3 (podspec)

Bumped version to 3.6.2 (readme)

Changed version in README

Update README.md