add ci for spec

Author: lixiaoyan

.travis.yml

@@ -0,0 +1,8 @@
+language: node_js
+node_js: node
+script:
+  - npm run lint
+  - npm run build
+cache:
+  directories:
+    - node_modules

package.json

@@ -5,6 +5,7 @@
   "scripts": {
     "start": "node ./mock.js",
     "build": "apollo-codegen introspect-schema *.graphql --output schema.json",
+    "lint": "prettier --no-semi --single-quote --list-different *.{graphql,js}",
     "prettier": "prettier --no-semi --single-quote --write *.{graphql,js}",
     "precommit": "lint-staged"
   },