Added the ability to decorate without options

[finico]

to create the components that do not need such options as a template, props, replace, etc
This is useful when mounting component to the existing DOM-element and it already contains a template with the expressions and need only data, methods, computer and hooks
eg

import Component from 'vue-class-component'

@Component
class Some {
  data () {
    ...
  }
  someHandler() {
    ...
  }
  get someComputed() {
    ...
  }
}

[yyx990803]

👍