Move to GitHub Actions (#6)

.github/workflows/main.yml

@@ -0,0 +1,23 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 14
+          - 12
+          - 10
+          - 8
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm test

.travis.yml

@@ -1,5 +0,0 @@
-language: node_js
-node_js:
-  - '12'
-  - '10'
-  - '8'

readme.md

@@ -1,4 +1,4 @@
-# p-defer [![Build Status](https://travis-ci.org/sindresorhus/p-defer.svg?branch=master)](https://travis-ci.org/sindresorhus/p-defer)
+# p-defer
 
 > Create a deferred promise