fdottedline 2.0.0

Help developers realize the dotted line in the simplest way.

1.0.0

• the first version

1.0.1

• Correct the judgment condition added last

2.0.0

• Migrate to null safety. Now supports Dart 2.12+ / Flutter 2+ (including Flutter 3.x).
• Fix: the dotted border now renders correctly when the child's size changes asynchronously (e.g. a network image finishing loading).