chore(greenkeeper): remove greenkeeper scripts, configs

Author: dhruvdutt

.travis.yml

@@ -34,12 +34,8 @@ install:
   - npm ci
   - npm install -g codecov
   - npm install -g eslint
-  - npm install -g greenkeeper-lockfile@2
   - lerna bootstrap
 
-before_script: greenkeeper-lockfile-update
-after_script: greenkeeper-lockfile-upload
-
 jobs:
   include:
     - stage: commit lint

README.md

@@ -14,7 +14,6 @@
 [![Dependency Status](https://david-dm.org/webpack/webpack-cli.svg)](https://david-dm.org/webpack/webpack-cli)
 [![Code Climate](https://codeclimate.com/github/webpack/webpack-cli/badges/gpa.svg)](https://codeclimate.com/github/webpack/webpack-cli)
 [![chat on gitter](https://badges.gitter.im/webpack/webpack.svg)](https://gitter.im/webpack/webpack)
-[![Greenkeeper badge](https://badges.greenkeeper.io/webpack/webpack-cli.svg)](https://greenkeeper.io/)
 [![Install Size](https://packagephobia.now.sh/badge?p=webpack-cli)](https://packagephobia.now.sh/result?p=webpack-cli)
 
 # webpack CLI