ci: Add workflows.

Author: milesj

.github/workflows/build.yml

@@ -0,0 +1,21 @@
+name: Build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [10, 12, 14]
+      fail-fast: true
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2-beta
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: yarn install --ignore-engines --frozen-lockfile
+      - run: yarn test

.github/workflows/pr.yml

@@ -0,0 +1,15 @@
+name: PR
+on: pull_request
+jobs:
+  conventional:
+    name: Conventional PR
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2-beta
+      - run: yarn install
+      - uses: beemojs/conventional-pr-action@v2
+        with:
+          auto-install: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}