chore(coveralls): adds coveralls

adds coveralls to build process

.travis.yml

@@ -3,6 +3,7 @@ sudo: required
 language: node_js
 node_js:
 - "8"
+after_success: 'npm run coveralls'
 
 os:
 - linux

package.json

@@ -11,6 +11,7 @@
     "leasot": "./node_modules/.bin/leasot './**/*.js' --ignore './node_modules/**/*' -x",
     "mocha": "./node_modules/.bin/mocha",
     "test": "npm run mocha && npm run leasot",
+    "coveralls": "nyc --reporter=lcovonly npm test -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage",
     "commit": "git-cz",
     "docs": "jsdoc2md --template build/README.hbs lib/*.js > README.md",
     "coverage": "nyc --reporter html --reporter text npm test",
@@ -52,6 +53,7 @@
     "@semantic-release/git": "^7.0.8",
     "chai": "^4.2.0",
     "commitizen": "^3.0.7",
+    "coveralls": "^3.0.3",
     "husky": "^1.3.1",
     "istanbul": "^0.4.5",
     "jsdoc-to-markdown": "^4.0.1",