yarn test github action added

Author: somya51p

.github/workflows/yarn.yml

@@ -0,0 +1,24 @@
+name: yarn
+
+on:
+  push:
+    branches: [ master ]
+    tags: [ '**' ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: borales/[email protected]
+        with:
+          cmd: install # will run `yarn install` command
+      - uses: borales/[email protected]
+        with:
+          cmd: build # will run `yarn build` command
+      - uses: borales/[email protected]
+        with:
+          cmd: test # will run `yarn test` command