Bump to 0.12.0 (purescript#3365)

Bump version for v0.12.0-rc1 (purescript#3340)

correctly quote uppercased field labels which would otherwise remain …

…unquoted (purescript#3148)

0.11.6

Fix test dependencies

[purs ide] Reads files in TextMode for adding imports (purescript#2850)

The functions provided in System.IO.UTF8 use ByteString's readFile, which uses
https://hackage.haskell.org/package/base-4.9.1.0/docs/System-IO.html#v:openBinaryFile
under the hood, which in turn causes trouble when we treat source files as text
on Windows.

0.11.3

0.11.2

0.11.1

Improve error when using old-style context (purescript#2773)