Add travis file

.travis.yml

@@ -0,0 +1,31 @@
+
+language: erlang
+
+matrix:
+
+  include:
+    - os: linux
+      dist: focal
+      otp_release: 24.0.2
+
+    - os: linux
+      dist: focal
+      otp_release: 23.1.2
+
+    - os: linux
+      dist: bionic
+      otp_release: 22.3
+
+    - os: osx
+      osx_image: xcode12.2
+      language: generic
+
+before_script:
+
+- if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
+- if [[ $TRAVIS_OS_NAME == osx ]]; then brew install erlang || true; fi
+
+- curl https://s3.amazonaws.com/rebar3/rebar3 --output rebar3 && chmod +x rebar3
+
+script:
+    - ./rebar3 compile