added github action for testing PRs

Author: mCodex

.github/workflows/test-pr.yml

@@ -0,0 +1,25 @@
+name: test-pr
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x]     
+
+    steps:
+    - uses: actions/[email protected]
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-node-${{ hashFiles('**/yarn.lock') }}
+        restore-keys: |
+            ${{ runner.os }}-node-
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: yarn install    
+    - run: yarn test