Replaced Travis with Github Actions

Author: andersevenrud

.github/FUNDING.yml

@@ -0,0 +1,7 @@
+# These are supported funding model platforms
+
+github: andersevenrud
+patreon: andersevenrud
+open_collective: osjs
+liberapay: os-js
+custom: https://paypal.me/andersevenrud

.github/workflows/lint.yml

@@ -0,0 +1,13 @@
+name: Lint tests
+on: [push, pull_request]
+jobs:
+  build:
+    name: Lint tests (node latest)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '13.x'
+      - run: npm install
+      - run: npm run eslint

.travis.yml

@@ -2,12 +2,10 @@
   <img alt="OS.js Logo" src="https://raw.githubusercontent.com/os-js/gfx/master/logo-big.png" />
 </p>
 
-[OS.js](https://www.os-js.org/) is an [open-source](https://raw.githubusercontent.com/os-js/OS.js/master/LICENSE) desktop implementation for your browser with a fully-fledged window manager, Application APIs, GUI toolkits and filesystem abstraction.
+[OS.js](https://www.os-js.org/) is an [open-source](https://raw.githubusercontent.com/os-js/OS.js/master/LICENSE) web desktop platform with a window manager, application APIs, GUI toolkit, filesystem abstractions and much more.
 
-[![Build Status](https://travis-ci.org/os-js/osjs-xterm-application.svg?branch=master)](https://travis-ci.org/os-js/osjs-xterm-application)
 [![Support](https://img.shields.io/badge/patreon-support-orange.svg)](https://www.patreon.com/user?u=2978551&ty=h&u=2978551)
-[![Back](https://opencollective.com/osjs/tiers/backer/badge.svg?label=backer&color=brightgreen)](https://opencollective.com/osjs)
-[![Sponsor](https://opencollective.com/osjs/tiers/sponsor/badge.svg?label=sponsor&color=brightgreen)](https://opencollective.com/osjs)
+[![Support](https://img.shields.io/badge/opencollective-donate-red.svg)](https://opencollective.com/osjs)
 [![Donate](https://img.shields.io/badge/liberapay-donate-yellowgreen.svg)](https://liberapay.com/os-js/)
 [![Donate](https://img.shields.io/badge/paypal-donate-yellow.svg)](https://paypal.me/andersevenrud)
 [![Community](https://img.shields.io/badge/join-community-green.svg)](https://community.os-js.org/)
@@ -65,9 +63,10 @@ You can also change the connection arguments:
 
 ## Contribution
 
+* **Sponsor on [Github](https://github.com/sponsors/andersevenrud)**
 * **Become a [Patreon](https://www.patreon.com/user?u=2978551&ty=h&u=2978551)**
 * **Support on [Open Collective](https://opencollective.com/osjs)**
-* [Contribution Guide](https://github.com/os-js/OS.js/blob/v3/CONTRIBUTING.md)
+* [Contribution Guide](https://github.com/os-js/OS.js/blob/master/CONTRIBUTING.md)
 
 ## Documentation