Upload the code test coverage report to coveralls

Author: prantlf

.coveralls.yml

@@ -0,0 +1,2 @@
+service_name: travis-pro
+

.travis.yml

@@ -10,6 +10,8 @@ node_js:
   - '8'
   - '6'
   - '4'
+after_success:
+  - npm run coverage
 branches:
   except:
     - /^v\d+\.\d+\.\d+$/

package.json

@@ -36,6 +36,7 @@
     "test": "npm run test:module && npm run test:cli",
     "test:module": "node test/all-tests",
     "test:cli": "nyc --silent node lib/cli package.json test/recursive && nyc --silent --no-clean node lib/cli -s -V test/passes/3.schema.json test/passes/3.json && nyc --silent --no-clean node lib/cli -v && nyc --silent --no-clean node lib/cli -h && nyc --silent --no-clean node lib/cli -pc test/fails/10.json || nyc report",
+    "coverage": "cat coverage/lcov.info | npx coveralls",
     "site": "cp web/jsonlint.js ../jsonlint-pages/jsonlint.js",
     "deploy": "cd ../jsonlint-pages && git commit -a -m 'Deploy site updates' && git push origin gh-pages"
   },