Better type parsing

Types after names separated by a ":" are not properly parsed.

@startuml
!theme plain
class Publication {
  title : String
}
@enduml

[
  {
    "elements": [
      {
        "name": "Publication",
        "title": "Publication",
        "isAbstract": false,
        "members": [
          {
            "name": "title",
            "isStatic": false,
            "accessor": "+",
            "type": "String"
          }
        ],
        "extends_": [],
        "implements_": [],
        "generics": [],
        "stereotypes": []
      }
    ]
  }
]