Add travis config

.travis.yml

@@ -0,0 +1,39 @@
+matrix:
+  include:
+    - os: osx
+      osx_image: xcode9.4
+      language: node_js
+      node_js: "10"
+      env:
+        - ELECTRON_CACHE=$HOME/.cache/electron
+        - ELECTRON_BUILDER_CACHE=$HOME/.cache/electron-builder
+
+    - os: linux
+      services: docker
+      language: generic
+
+cache:
+  directories:
+    - node_modules
+    - $HOME/.cache/electron
+    - $HOME/.cache/electron-builder
+
+script:
+  - |
+    if [ "$TRAVIS_OS_NAME" == "linux" ]; then
+      docker run --rm \
+        --env-file <(env | grep -iE 'DEBUG|NODE_|ELECTRON_|YARN_|NPM_|CI|CIRCLE|TRAVIS|APPVEYOR_|CSC_|_TOKEN|_KEY|AWS_|STRIP|BUILD_') \
+        -v ${PWD}:/project \
+        -v ~/.cache/electron:/root/.cache/electron \
+        -v ~/.cache/electron-builder:/root/.cache/electron-builder \
+        electronuserland/builder \
+        /bin/bash -c "npm run release:linux"
+    else
+      npm run release:mac
+    fi
+before_cache:
+  - rm -rf $HOME/.cache/electron-builder
+
+branches:
+  except:
+    - "/^v\\d+\\.\\d+\\.\\d+$/"