Added coveralls badge

Author: cemremengu

README.md

@@ -1,7 +1,7 @@
 # fastify-oracle
 [![Greenkeeper badge](https://badges.greenkeeper.io/cemremengu/fastify-oracle.svg)](https://greenkeeper.io/)
 
-[![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com) [![Build Status](https://travis-ci.org/cemremengu/fastify-oracle.svg?branch=master)](https://travis-ci.org/cemremengu/fastify-oracle)
+[![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com) [![Build Status](https://travis-ci.org/cemremengu/fastify-oracle.svg?branch=master)](https://travis-ci.org/cemremengu/fastify-oracle) [![Coverage Status](https://coveralls.io/repos/github/cemremengu/fastify-oracle/badge.svg)](https://coveralls.io/github/cemremengu/fastify-oracle)
 
 This module provides access to an Oracle database connection pool via the
 [oracledb](https://npm.im/oracledb) module. It decorates the [Fastify](https://fastify.io)

package.json

@@ -26,7 +26,6 @@
   },
   "homepage": "https://github.com/cemremengu/fastify-oracle#readme",
   "devDependencies": {
-    "coveralls": "^3.0.2",
     "fastify": "^1.11.1",
     "pre-commit": "^1.2.2",
     "snazzy": "^8.0.0",