Replace TravisCI by CircleCI.

.circleci/config.yml

@@ -0,0 +1,42 @@
+version: 2
+jobs:
+  test:
+    machine:
+      image: circleci/classic:latest
+
+    steps:
+      - checkout
+      - run:
+          name: run tests
+          command: docker-compose run --rm packetmultiplexer make test
+
+  deploy:
+    machine:
+      image: circleci/classic:latest
+
+    steps:
+      - checkout
+      - run:
+          name: compile distributable binaries
+          command: docker-compose run --rm packetmultiplexer make dist
+      - run:
+          name: upload binaries to s3
+          command: aws s3 sync dist/upload s3://builds.loraserver.io/lora-packet-multiplexer
+
+workflows:
+  version: 2
+  test-and-deploy:
+    jobs:
+      - test:
+          filters:
+            tags:
+              only: /.*/
+      - deploy:
+          requires:
+            - test
+          filters:
+              tags:
+                only: /^v.*/
+              branches:
+                ignore: /.*/
+