ci: ci workflows

Author: erunion

.github/PULL_REQUEST_TEMPLATE.md

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+## 🧰 Changes
+
+Describe in detail what this PR is for.
+
+## 🧬 QA & Testing
+
+Provide as much information as you can on how to test what you've done.

.github/workflows/ci.yml

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+name: CI
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x]
+
+    steps:
+      - uses: actions/checkout@v2.4.0
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2.5.1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install npm@7
+        run: npm install -g npm@7
+
+      - name: Install deps
+        run: npm ci
+
+      - name: Build dist
+        run: npm run build
+
+      - name: Run tests
+        run: npm test