feat: add github workflow

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: Stringy
+
+on: push
+
+jobs:
+
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+
+      - name: Test
+        run: go test -v ./...