Expand the CI matrix

Author: mortenpi

.github/workflows/CI.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - main
-    tags: '*'
+    tags: ['*']
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -14,9 +14,12 @@ jobs:
       matrix:
         version:
           - '1.6'
-          - '1.8'
+          - '1'
+          - 'nightly'
         os:
           - ubuntu-latest
+          - macos-latest
+          - windows-latest
         arch:
           - x64
     env: