Set up GitHub actions

Author: luin

.github/workflows/push-requests.yml

@@ -0,0 +1,9 @@
+name: Pull Requests
+
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    uses: ./.github/workflows/test.yml

.github/workflows/test.yml

@@ -0,0 +1,13 @@
+on:
+  workflow_call:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Git checkout
+        uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+      - run: npm install
+      - run: npm test

.travis.yml

@@ -5,6 +5,9 @@
   "author": "Jason Chen <jhchen7@gmail.com>",
   "main": "diff.js",
   "types": "diff.d.ts",
+  "files": [
+    "diff.d.ts"
+  ],
   "devDependencies": {
     "lodash": "~4.17.21",
     "nyc": "~15.1.0",
@@ -24,4 +27,4 @@
   "keywords": [
     "diff"
   ]
-}
+}