Fixed npm warning about "repositories" property
Fixed npm warning about "repositories" property

After adding *svg.js* as a dependency

```
$ npm install svg.js --save                                                                                                                        
svg.js@1.0.1 node_modules/svg.js
```

when I update deps I get a warning

```
$ npm install
npm WARN package.json svg.js@1.0.1 'repositories' (plural) Not supported.
npm WARN package.json Please pick one as the 'repository' field
svg.js@1.0.1 node_modules/svg.js
```
erpframework/svg.js,renyaoxiang/svg.js,dotnetCarpenter/svg.js,albohlabs/svg.js,albohlabs/svg.js,linorabolini/svg.js,renyaoxiang/svg.js,nagyistoce/svg.js,justintung/svg.js,imshibaji/svg.js,mcanthony/svg.js,linorabolini/svg.js,mcanthony/svg.js,SaravananRajaraman/svg.js,justintung/svg.js,imshibaji/svg.js,nagyistoce/svg.js,erpframework/svg.js,SaravananRajaraman/svg.js,dotnetCarpenter/svg.js