Null Check operator on Null value error

[prajwal27]

onTap function is marked as nullable, but ! null check operator is used on it, which results in an error in one of my apps.

If this is a legit issue, can I make an MR fixing this?

[Brinfotech1407]

I am to facing this issue

Null check operator used on a null value

When the exception was thrown, this was the stack:
#0 ParsedText.build.. (package:flutter_parsed_text/src/parsed_text.dart:170:46)
#1 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
#2 TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:607:11)
#3 BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:296:5)
#4 BaseTapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:267:7)
...

[JhonyPerez]

Fix for the issue: #50