Improved Code Coverage reporting

Author: ahnv

.nycrc.json

@@ -0,0 +1,5 @@
+{
+  "reporter": ["lcov", "text"],
+  "exclude": ["babel-register.js", "test"],
+  "include": ["src"]
+}

package.json

@@ -40,7 +40,7 @@
         "build": "rm -rf dist*;rollup -c",
         "test": "NODE_ENV=test nyc ./node_modules/mocha/bin/mocha test/*.js",
         "startSampleApp": "yarn build && cd samples/sample-app/ && yarn install && node index.js",
-        "report-coverage": "nyc report --reporter=text-lcov > coverage.lcov && codecov"
+        "report-coverage": "codecov"
     },
     "repository": {
         "type": "git",