ci: add matrix testing (#471)

* ci: add matrix testing

* idk

.github/workflows/test.yml

@@ -3,11 +3,18 @@ on: [push, pull_request]
 jobs:
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        deno: ["v1.x", "nightly"]
     steps:
       - uses: actions/checkout@v2
       - uses: denolib/setup-deno@v2
+        with:
+          deno-version: {{ matrix.deno }}
       - name: Cache dependencies
-        run: deno cache mod.ts
+        run: |
+        deno version
+        deno cache mod.ts
       - name: Run test script
         if: github.ref == 'refs/heads/master'
         run: deno test --allow-net --allow-env