Migrate Travis to GitHub Actions (#33)

* Migrate Travis to GitHub Actions

* Update badges

Author: duffn

.github/workflows/rubocop.yml

@@ -0,0 +1,17 @@
+name: lint
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    name: RuboCop
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "2.6.5"
+          bundler-cache: true
+      - name: Run RuboCop
+        run: bundle exec rubocop

.github/workflows/test.yml

@@ -0,0 +1,32 @@
+name: test
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Firefox
+        uses: browser-actions/setup-firefox@latest
+        with:
+          firefox-version: "54.0"
+      - name: Download geckodriver
+        uses: browser-actions/setup-geckodriver@latest
+        with:
+          geckodriver-version: "0.18.0"
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "2.6.5"
+          bundler-cache: true
+      - name: Start MongoDB
+        uses: supercharge/[email protected]
+        with:
+          mongodb-version: "5"
+          mongodb-db: shellbot_test
+      - name: Run tests
+        uses: GabrielBB/xvfb-action@v1
+        with:
+          run: bundle exec rake

.travis.yml

@@ -1,8 +1,8 @@
-Slack-Shellbot
-=============
+# Slack-Shellbot
 
 [![Add to Slack](https://platform.slack-edge.com/img/[email protected])](http://shell.playplay.io)
-[![Build Status](https://travis-ci.org/slack-ruby/slack-shellbot.svg)](https://travis-ci.org/slack-ruby/slack-shellbot)
+[![rubocop](https://github.com/slack-ruby/slack-shellbot/actions/workflows/rubocop.yml/badge.svg)](https://github.com/slack-ruby/slack-shellbot/actions/workflows/rubocop.yml)
+[![test](https://github.com/slack-ruby/slack-shellbot/actions/workflows/test.yml/badge.svg)](https://github.com/slack-ruby/slack-shellbot/actions/workflows/test.yml)
 [![Code Climate](https://codeclimate.com/github/slack-ruby/slack-shellbot/badges/gpa.svg)](https://codeclimate.com/github/slack-ruby/slack-shellbot)
 
 A shell bot for Slack. A demo is worth a thousand words.