Ensure paths are escaped to account for names used as IDs (#963)

* encode path for VPN connection requests

Ensures paths are properly encoded in the event they contain spaces or special characters

* remove reference to deleteVPN that has been previously removed

packages/spaces/lib/vpn-connections.js

@@ -18,19 +18,13 @@ module.exports = function (heroku) {
   }
 
   function deleteVPNConnection (space, name) {
-    let lib = require('../lib/vpn')(heroku)
-
-    if (!name) {
-      return lib.deleteVPN(space)
-    }
-
     return request('DELETE', `/spaces/${space}/vpn-connections/${name}`)
   }
 
   function request (method, path, body) {
     return heroku.request({
       method: method,
-      path: path,
+      path: encodeURI(path),
       body: body
     })
   }