preconditions 0.0.7

Pure Dart library for management of preconditions in Flutter apps. Has the user granted all permissions? Is the phone online? Is there enough free disk space?

[0.0.7] 2021-04-06

• added few more useful methods

[0.0.6] 2021-04-05

• few convenient changes to make API users life easier

[0.0.5] 2021-04-05

• Basic functions and docs, decent "beta"