chore: setup github actions

.github/workflows/main.yaml

@@ -1,24 +1,28 @@
 name: zwis library workflow
 
 on:
-  push: 
+  push:
     branches:
-      - main 
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
-  build:
+  test:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v2
-      - name: Setup Go 
-        uses: actions/checkout@v2 
-        with: 
-          go-version: '1.21'
-      - name: Install dependencies 
-        run: |
-          go version
-          go install -v ./...
-          
-      - name: Run Tests 
-        run: |
-          go test -v ./tests/...
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.20
+
+      - name: Install dependencies
+        run: go mod tidy
+
+      - name: Run tests
+        run: go test -v ./tests/...