ci: add mac os to matrix tests

Signed-off-by: Boris Glimcher <[email protected]>

Author: glimchb

.github/workflows/test.yml

@@ -3,10 +3,12 @@ name: test
 on: [push, pull_request]
 jobs:
   build:
-    runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         go: [ '1.18', '1.19', '1.20', '1.21' ]
+        os: [macos-latest, ubuntu-latest]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v3
@@ -17,6 +19,12 @@ jobs:
           version: v1.13.0
           install-only: true
 
+      - name: Setup docker (missing on MacOS)
+        if: contains(runner.os, 'macos')
+        run: |
+          brew install docker
+          colima start
+
       - run: |
           go version
           go env