null_safety_percentage 1.0.0+3

Command-line tool to provide null-safety percentage info of a project. Track your migration progress on mixed-version programs that execute with unsound null safety.

1.0.0+1, 1.0.0+2, 1.0.0+3

• Docs improvements, fix license so it gets recognized by pubdev?

1.0.0

• Initial version.