message: Implement moveToCursor() for InMemoryEditor
diff: @@ -150,8 +150,8 @@ export class InMemoryEditor implements Editor {
  return Promise.resolve(defaultValue);
  }
  - moveCursorTo(_position: Position) {
  - return Promise.resolve();
  + async moveCursorTo(position: Position) {
  + this._selection = Selection.cursorAtPosition(position);
  }
  private setCodeMatrix(code: Code) {
  