Add GitHub CI

.github/workflows/ci.yml

@@ -0,0 +1,43 @@
+name: CI checks
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - master
+jobs:
+  build:
+    strategy:
+      matrix:
+        platform: [ubuntu-latest]
+        otp-version:
+          - "22.3"
+          - "23.3"
+          - "24.3"
+          - "25.3"
+          - "26"
+    runs-on: ${{ matrix.platform }}
+    container:
+      image: erlang:${{ matrix.otp-version }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Compile
+      run: rebar3 compile
+
+    - name: Run Proper Tests
+      run: rebar3 proper -c
+
+    - name: Coverage
+      run: rebar3 cover --verbose --min_coverage 80
+
+    - name: Run Xref
+      run: rebar3 xref
+
+    - name: Generate Documentation
+      run: rebar3 edoc
+
+    - name: Run dialyzer
+      run: rebar3 dialyzer