Switch to GitHub Actions for CI

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Read .nvmrc
+        id: nvm
+        run: echo "##[set-output name=node_version;]$(cat .nvmrc)"
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "${{ steps.nvm.outputs.node_version }}"
+      - name: Get the Yarn cache
+        id: yarn-cache
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+      - uses: actions/cache@v1
+        with:
+          path: ${{ steps.yarn-cache.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - name: Install packages
+        run: yarn install --frozen-lockfile
+      - name: Check formatting
+        run: yarn run format:check
+      - name: Lint the code
+        run: yarn run lint

README.md

@@ -1,6 +1,7 @@
 # Make a README
 
-[![Build Status](https://travis-ci.org/dguo/make-a-readme.svg?branch=master)](https://travis-ci.org/dguo/make-a-readme) [![Netlify Status](https://api.netlify.com/api/v1/badges/68992d1c-36d4-4a84-b177-00c1f64fbcb4/deploy-status)](https://app.netlify.com/sites/make-a-readme/deploys)
+[![Netlify Status](https://api.netlify.com/api/v1/badges/68992d1c-36d4-4a84-b177-00c1f64fbcb4/deploy-status)](https://app.netlify.com/sites/make-a-readme/deploys)
+[![CI status](https://github.com/dguo/make-a-readme/workflows/CI/badge.svg)](https://github.com/dguo/make-a-readme/actions?query=branch%3Amaster)
 
 [Make a README](https://makeareadme.com) explains what a README is, what the
 benefits are, and what makes for a good README. It also provides an editable