Update dependencies to enable Greenkeeper 🌴 (#41)

* chore(package): update dependencies

* chore(travis): whitelist greenkeeper branches

* docs(readme): add Greenkeeper badge

* Update README.md

* Add Travis CI badge

Author: greenkeeper[bot]

.travis.yml

@@ -11,6 +11,7 @@ script: npm run test -- --runInBand
 branches:
   only:
     - master
+    - /^greenkeeper/.*$/
 
 cache:
   directories:

README.md

@@ -2,7 +2,7 @@
 
 A Vue Cli 3 plugin for Electron with no required configuration that uses [Electron Builder](https://www.electron.build/).
 
-AppVeyor build status: [![Build status](https://ci.appveyor.com/api/projects/status/tyrr8kemli4vfll7?svg=true)](https://ci.appveyor.com/project/nklayman/vue-cli-plugin-electron-builder)
+Win/Node 10: [![Build status](https://ci.appveyor.com/api/projects/status/tyrr8kemli4vfll7?svg=true)](https://ci.appveyor.com/project/nklayman/vue-cli-plugin-electron-builder), Linux/Node 8: [![Build Status](https://travis-ci.org/nklayman/vue-cli-plugin-electron-builder.svg?branch=master)](https://travis-ci.org/nklayman/vue-cli-plugin-electron-builder), Greenkeeper: [![Greenkeeper badge](https://badges.greenkeeper.io/nklayman/vue-cli-plugin-electron-builder.svg)](https://greenkeeper.io/)
 
 **IMPORTANT: Your app must be created with Vue-CLI 3 (vue create my-app), will not work with Vue-CLI 2 (vue init webpack my-app)!**
 

package.json

@@ -58,6 +58,6 @@
     "portfinder": "^1.0.13",
     "rimraf": "^2.6.2",
     "vue": "^2.5.16",
-    "vuepress": "^0.12.0"
+    "vuepress": "^0.13.1"
   }
 }