fix: classic-decorator-no-classic-methods matching private identifiers

[c0rydoras]

class Example extends Component {
  #set = (name, value) => {
    ...
  }

  setFoo = (value) => {
    ...
    this.#set('foo', value); // this.#set is perfectly fine, but currently the rule disallows it
    ...
  }

  <template>
  ...
  </template>
}