Merge pull request #32 from jcs-PR/tests/platforms

tests: Test on all os platforms

.github/workflows/build.yml

@@ -10,16 +10,34 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        emacs-version:
+          - 26.3
+          - 27.2
+          - 28.2
+          - snapshot
 
     steps:
       - uses: actions/checkout@v3
 
       - name: Setup Emacs
-        uses: purcell/setup-emacs@master
+        uses: jcs090218/setup-emacs@master
         with:
-         version: 26.1
-
+         version: ${{ matrix.emacs-version }}
+
+      # Remove expired DST Root CA X3 certificate. Workaround for
+      # https://debbugs.gnu.org/cgi/bugreport.cgi?bug=51038 bug on Emacs 27.2.
+      # https://github.com/jcs090218/setup-emacs-windows/issues/156#issuecomment-1126671598
+      - name: Workaround for Emacs 27.x and below's Windows build from GNU FTP
+        if: ${{ runner.os == 'Windows' && (matrix.emacs-version == '26.3' || matrix.emacs-version == '27.2') }}
+        run: |
+          gci cert:\LocalMachine\Root\DAC9024F54D8F6DF94935FB1732638CA6AD77C13
+          gci cert:\LocalMachine\Root\DAC9024F54D8F6DF94935FB1732638CA6AD77C13 | Remove-Item
+
       - name: Emacs Lisp check
         uses: leotaku/[email protected]
         with: