npminstall run istanbul

Author: kk.shen

.gitignore

@@ -1,3 +1,4 @@
 .vscode/
 node_modules/
 .DS_Store
+coverage

.travis.yml

@@ -3,11 +3,12 @@ language: node_js
 node_js:
 - node
 install:
+- npm install
 - npm install -g codecov
 - npm install -g istanbul
 script:
 - npm run test
-- istanbul cover ./node_modules/mocha/bin/_mocha --reporter lcovonly -- -R spec
+- istanbul cover ./node_modules/mocha/bin/_mocha --reporter
 - codecov --token=69a600d6-9548-4591-a229-91070f5f05dd
 deploy:
   provider: npm