build(github): Added CI workflows

Author: nonara

.github/workflows/build.yml

@@ -0,0 +1,50 @@
+name: Build (CI)
+
+on:
+  pull_request:
+    branches: [ master ]
+    types: [ opened, synchronize, closed ]
+  push:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [ 12.x, 14.x, 16.x ]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Determine Yarn Cache Path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
+      - uses: actions/cache@v1
+        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: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install Packages
+        run: yarn install --frozen-lockfile
+
+      - name: Build
+        run: yarn build
+        env:
+          CI: true
+
+      - name: Test
+        run: yarn run test
+        env:
+          CI: true

.github/workflows/publish.yml

@@ -0,0 +1,47 @@
+name: Publish
+
+on:
+  push:
+    tags:
+      - v*.*.*
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js 12.x to publish to npmjs.org
+        uses: actions/setup-node@v1
+        with:
+          node-version: '12.x'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install Packages
+        run: yarn install --frozen-lockfile
+
+      - name: Build
+        run: yarn build
+        env:
+          CI: true
+
+      - name: Test
+        run: yarn run test
+        env:
+          CI: true
+
+      - name: Generate Release Body
+        run: npx extract-changelog-release > RELEASE_BODY.md
+
+      - name: Publish to NPM
+        run: yarn publish --non-interactive
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: Create GitHub Release
+        uses: ncipollo/release-action@v1
+        with:
+          bodyFile: "RELEASE_BODY.md"
+          token: ${{ secrets.GITHUB_TOKEN }}