add tests that we can install a dist

.github/workflows/install-dist.yml

@@ -0,0 +1,54 @@
+on: [push, pull_request]
+name: Dist installation
+
+jobs:
+  build:
+    runs-on: 'macos-10.15'
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Perl environment
+        uses: shogo82148/actions-setup-perl@v1
+      - name: Test and build
+        run: |
+          cpanm --installdeps .
+          echo|perl Build.PL
+          ./Build test
+          ./Build dist
+      - uses: actions/upload-artifact@v2
+        with:
+          name: dist-for-installation-test
+          path: '*.tar.gz'
+          retention-days: 1
+  install-linux:
+    runs-on: 'ubuntu-latest'
+    needs: build
+    container:
+      image: perl:5.34
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist-for-installation-test
+      - name: Install on Linux
+        run: |
+          cpanm *.tar.gz
+  install-openbsd:
+    runs-on: macos-10.15
+    needs: build
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: dist-for-installation-test
+      - name: Install on OpenBSD
+        uses: cross-platform-actions/action@v0.2.0
+        with:
+          operating_system: openbsd
+          version: 6.9
+          shell: bash
+          run: |
+            mkdir dist-for-test &&
+            tar -C dist-for-test -xzf *.tar.gz &&
+            cd dist-for-test/* &&
+            cpan App::cpanminus &&
+            /home/runner/perl5/bin/cpanm --quiet --notest --installdeps . &&
+            /home/runner/perl5/bin/cpanm -v .
+