flutter_generate_assets 0.4.1

To satisfy our team's needs, I changed something based on previous author's repository(flutter_asset_generator).

Change log

[0.4.1] change default path

change default path

[0.1.4] null safe1

null safe1

[0.1.3] null safe

null safe

[0.1.2] watch pubspec

watch pubspec

[0.1.1]

update readme

[0.1.0]

first version