test(lint): add script to run tslint

Author: Raphaël Benitte

.travis.yml

@@ -5,6 +5,7 @@ node_js:
 before_script:
   - yarn install
 script:
+  - yarn lint
   - yarn test
 
 

package.json

@@ -38,6 +38,7 @@
     "start": "react-scripts-ts start",
     "build": "react-scripts-ts build",
     "test": "react-scripts-ts test --env=jsdom",
+    "lint": "tslint -c tslint.json 'src/**/*.ts'",
     "demo:publish": "PUBLIC_URL=https://plouc.github.io/wiremock-ui yarn run build && node scripts/publish_demo.js",
     "demo:pub": "yarn run demo:publish"
   }