Update to v0.14.0-rc3 (#12)

* Update packages.dhall to prepare-0.14 bootstrap

* Update CI to use v0.14.0-rc3 PS release

Author: JordanMartinez

.github/workflows/ci.yml

@@ -11,6 +11,8 @@ jobs:
 
       - name: Set up PureScript toolchain
         uses: purescript-contrib/setup-purescript@main
+        with:
+          purescript: "0.14.0-rc3"
 
       - name: Cache PureScript dependencies
         uses: actions/cache@v2

packages.dhall

@@ -1,4 +1,4 @@
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20200724/packages.dhall sha256:bb941d30820a49345a0e88937094d2b9983d939c9fd3a46969b85ce44953d7d9
+      https://raw.githubusercontent.com/purescript/package-sets/prepare-0.14/src/packages.dhall
 
 in  upstream