Escape escape sequences

Backslashes in release title, and body should work now.

Decriminalize quotes

This release adds escaping of quotes in name, and body.

Allow Asset Override

This release:

• Allows asset override when allow_override property is set to true as per #2
• Adds some Github metadata sugar

Simplified & Updated

This release:

• [BREAKING] Removes support for RELEASE_ env vars in favor of explicitly passed ${{ env.????? }}
• Adds support for multiline body:

   with:
   	body: |
   		This
   		now
   		
   		works!

• Adds a two-stage release (only published if all assets uploaded successfully)
• Updates Alpine to 3.11
• Removes unnecessary { & } from code
• Various docs, and variables name changes

ENV vars exposed

This release lets you set some inputs using ENV variables whenever setting values dynamically is necessary.

Initial release

See README for details :).