Devolay Release v2.1.1

Thank you to the users who made contributions for this release!
@nocarryr and @kmod-midori

Changelog:

• Fixed compatibility with NDI SDK v5 (#29)
• Added DevolayReceiver#setTally (#30)
• Fixed crashing upon calling DevolayReceiver#close (#33 / #32)
• Revamped the build process, to stop silent build fails, notably on Android (#27)