chore: add actions tests (#432)

.github/FUNDING.yml

@@ -1,2 +1,3 @@
-github: amilajack
+github: [amilajack]
 patreon: amilajack
+custom: ['https://paypal.me/amilajack', 'https://venmo.com/amilajack']

.github/workflows/test.yml

@@ -0,0 +1,38 @@
+name: Test
+
+on: push
+
+jobs:
+  release:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [macos-10.14, ubuntu-18.04, windows-2019]
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v2
+
+      - name: Install Node.js, NPM and Yarn
+        uses: actions/setup-node@v1
+        with:
+          node-version: 15
+
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
+      - uses: actions/cache@v2
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+
+      - name: yarn install
+        run: yarn --frozen-lockfile
+
+      - name: yarn test
+        run: yarn test