Test on the pre-release version of julia (#361)

Author: jishnub

.github/workflows/ci.yml

@@ -39,6 +39,7 @@ jobs:
         version:
           - 'lts'
           - '1'
+          - 'pre'
         os:
           - ubuntu-latest
           # - macOS-latest # FastTransforms.jl is broken on macOS-latest