Migrate to Github Actions

.github/workflows/ci.yml

@@ -0,0 +1,23 @@
+name: CI
+
+on: [push]
+
+env:
+  CI: true
+
+jobs:
+  Test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        channel: [stable, beta]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v1
+    - uses: UziTech/action-setup-atom@v2
+      with:
+        version: ${{ matrix.channel }}
+    - name: Install dependencies
+      run: apm install
+    - name: Run tests
+      run: atom --test spec

README.md

@@ -1,5 +1,5 @@
 # Symbols View package
-[![macOS Build Status](https://travis-ci.org/atom/symbols-view.svg?branch=master)](https://travis-ci.org/atom/symbols-view) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/al68vtv83x49eu5d/branch/master?svg=true)](https://ci.appveyor.com/project/Atom/symbols-view/branch/master) [![Dependency Status](https://david-dm.org/atom/symbols-view.svg)](https://david-dm.org/atom/symbols-view)
+[![CI](https://github.com/atom/symbols-view/actions/workflows/ci.yml/badge.svg)](https://github.com/atom/symbols-view/actions/workflows/ci.yml)
 
 Display the list of functions/methods in the editor.