Switch from Travis to Github Actions

.github/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+
+  tests:
+    name: Tests
+    strategy:
+      fail-fast: false
+      matrix:
+        otp: ['19.3', '21.3', 24]
+    runs-on: ubuntu-20.04
+    container:
+      image: erlang:${{ matrix.otp }}
+
+    steps:
+
+    - uses: actions/checkout@v2
+
+    - name: Cache rebar3
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cache/rebar3/
+        key: ${{matrix.otp}}-${{hashFiles('rebar.config')}}
+
+    - run: rebar3 compile
+    - run: rebar3 xref
+    - run: rebar3 dialyzer
+    - run: rebar3 eunit -v
+
+    - name: Send to Coveralls
+      if: matrix.otp == 24
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+        rebar3 as test coveralls send
+        curl -v -k https://coveralls.io/webhook \
+             --header "Content-Type: application/json" \
+             --data '{"repo_name":"$GITHUB_REPOSITORY",
+                      "repo_token":"$GITHUB_TOKEN",
+                      "payload":{"build_num":$GITHUB_RUN_ID,
+                                 "status":"done"}}'