Migrate to GitHub Actions

.github/workflows/erlang.yml

@@ -0,0 +1,36 @@
+name: Erlang CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        erlang-version:
+          - '21.0'
+          - '20.3'
+          - '19.3'
+          - '18.3'
+
+    container:
+      image: erlang:${{ matrix.erlang-version }}
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Compile
+      run: ./rebar3 compile
+    - name: Run tests
+      run: ./rebar3 do eunit, ct
+    - name: Run xref
+      run: ./rebar3 xref
+    - name: Run dialyzer
+      run: ./rebar3 dialyzer
+    - name: Run edoc
+      run: ./rebar3 as dev edoc