Announcing Scala.js 1.14.0.

[gzm0]

Needs to wait for:

• Scala 2.13.12 update
• Actual release :P

[gzm0]

This is complete now.

• Needs to wait on the actual release of course.
• Needs the correct date.

[gzm0]

• Addresses all the comments (I forgot to push some changes last time, sorry).
• Adjusted the date
• Squashed.