Switch from Travis CI to GitHub Actions (#1231)

* Create Github Action to run tests on push

* -v

* Update tests.yml

* TODO: Fix tests

* Fix colours

* Delete .travis.yml

* Update tests.yml

* builds -> build

.github/workflows/tests.yml

@@ -0,0 +1,50 @@
+name: Run tests
+on: [push]
+jobs:
+
+  test:
+    name: Test repo
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Set up Go 1.13
+      uses: actions/setup-go@v1
+      with:
+        go-version: 1.13
+      id: go
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Get dependencies
+      run: |
+        go get -v -t -d ./...
+
+    - name: Run tests
+      id: tests
+      env:
+        IN_TRAVIS_CI: yes
+      run: go test -v ./...
+  
+    - name: Notify of test failure
+      if: failure()
+      uses: rtCamp/action-slack-notify@v2.0.0
+      env:
+        SLACK_CHANNEL: build
+        SLACK_COLOR: '#BF280A'
+        SLACK_ICON: https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png
+        SLACK_TITLE: Tests Failed
+        SLACK_USERNAME: GitHub Actions
+        SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_URL }}
+        
+    - name: Notify of test success
+      if: success()
+      uses: rtCamp/action-slack-notify@v2.0.0
+      env:
+        SLACK_CHANNEL: build
+        SLACK_COLOR: '#1FAD2B'
+        SLACK_ICON: https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png
+        SLACK_TITLE: Tests Passed
+        SLACK_USERNAME: GitHub Actions
+        SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_URL }}
+