Prepare v4.0.0 release (1st PS 0.15.0-compatible release) (#82)

* Update the bower dependencies

* Update Node to 14 in CI

* Update the changelog

Prepare v3.0.0 release (#79)

* Update CI to build with the latest version of the compiler

* Update the bower repository URL to match the URL in the registry

* Upgrade bower dependencies

* Update the changelog

* Remove st from dependencies

* Don't mention Record.ST in the readme anymore

Merge pull request #46 from purescript/compiler/0.12

Updates for PureScript 0.12

add rename and Builder.rename (#18)

STRecord (#9)

Add unsafeHas (#14)