[FEATURE]Please check the pubspec.lock file into the repo

[linsui]

Is your feature request related to a problem? Please describe.
Without the lock file it's difficult to build an old version.

Describe the solution you'd like
Remove pubspec.lock from gitigonre.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[BrightDV]

Thanks for the report! I just removed it from the .gitignore

[linsui]

Thanks!