fix(interfaces): mark only the method which corresponds to non-implemented interface

[mgechev]

Currently the text editors mark the entire class and it can get quite noisy. It'll be better to mark only the method which requires implementation of an interface, for instance:

@Component({
  // ...
})
export class ZippyComponent {
  ngOnInit() {
    // ...
  }
}

Should mark only the substring:

  ngOnInit() {
    // ...
  }

This requires changes for:

• useLifeCycleInterfaceRule.
• usePipeTransformInterfaceRule

And their test files.

[preslavsh]

#92 Updates that