Swift plugin was removed from the README.md

[susurri]

Describe the Bug

#39 removed swift plugin from the README.md, which must be an accident.

Steps to Reproduce

see the README.md

Expected Behaviour

swift plugin IS in the README.md

Actual Behaviour

swift plugin is NOT in the README.md

Environment

none

[James Hegedus]

This may have been removed by mistake.

These plugins are community driven, so if you wish to see a plugin here, then please PR an update.