Replace TravisCI with Github Actions

Signed-off-by: Thomas Citharel <[email protected]>

Author: tcitworld

.github/workflows/ci.yml

@@ -0,0 +1,23 @@
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
+    strategy:
+      matrix:
+        otp: ["21.3", "22.2", "23.3", "24.0"]
+        elixir: ["1.10.4", "1.11.4", "1.12.1"]
+        exclude:
+          - otp: "21.3"
+            elixir: "1.12.1"
+          - otp: "24.0"
+            elixir: "1.10.4"
+    steps:
+      - uses: actions/checkout@v2
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{matrix.otp}}
+          elixir-version: ${{matrix.elixir}}
+      - run: mix deps.get
+      - run: mix test