Prepare travis builds

.travis.yml

@@ -0,0 +1,26 @@
+language: node_js
+
+cache:
+  directories:
+  - node_modules
+  - $HOME/.cache/electron
+  - $HOME/.cache/electron-builder
+  - $HOME/.npm/_prebuilds
+
+node_js:
+  - "10"
+
+os:
+  - linux
+  - osx
+
+install:
+  - npm install
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install snapd && sudo snap install snapcraft --classic; fi
+
+script:
+  - npm run build
+  - npm run prepare-release
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then npm run package -- linux; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then npm run package -- mac; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then npm run package -- win; fi