add coverage

Author: Nathan Mahdavi

Diff for: .travis.yml

@@ -11,6 +11,7 @@ dist: trusty
 
 jobs:
   include:
-  - script: npm run lint
   - script:
+    - npm run lint
     - npm run test:prod
+    - npm run coverage

Diff for: README.md

@@ -1,6 +1,6 @@
 # npm user manager
 
-[![Travis](https://img.shields.io/travis/scripter-co/npm-users.svg)](https://travis-ci.org/scripter-co/npm-users) [![npm](https://img.shields.io/npm/v/npm-users.svg)](https://www.npmjs.com/package/npm-users)
+[![Travis](https://img.shields.io/travis/scripter-co/npm-users.svg)](https://travis-ci.org/scripter-co/npm-users) [![Codecov](https://img.shields.io/codecov/c/github/scripter-co/npm-users.svg)]() [![npm](https://img.shields.io/npm/v/npm-users.svg)](https://www.npmjs.com/package/npm-users)
 
 
 ## Installation

Diff for: package-lock.json

@@ -6,6 +6,7 @@
   "scripts": {
     "test": "jest --watch",
     "test:prod": "jest",
+    "coverage": "jest --coverage && codecov",
     "lint": "eslint ."
   },
   "bin": {
@@ -21,6 +22,7 @@
     "commander": "^2.12.2"
   },
   "devDependencies": {
+    "codecov": "^3.0.0",
     "eslint": "^4.15.0",
     "eslint-plugin-jest": "^21.6.1",
     "jest": "^22.0.6"