Generator use `newInstance` method name

[sla100]

Describe the bug When I used java-ts-gen i got factory method:

export declare class AppClass extends JavaClass {
  // ...
  public static newInstance(): Promise<App>;
  // ...
}

But regardles to documentation its name should be newInstanceAsync.

Environment

• OS: Windows
• Node.js version: 18.15.0
• Java version: 17
• Version of this package: 2.2.3

Additional context TypescriptDefinitionGenerator.ts#L343