feature: Adds github test CI

Author: NeedleInAJayStack

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: test
+on:
+  pull_request:
+  push: { branches: [ main ] }
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: fwal/setup-swift@v1
+      - uses: actions/checkout@v2
+      - name: Run tests
+        run: swift test