upgrade to androidX

[juicycleff]

Upgrade library to support AndroidX

[YouCii]

Great, I am bothered by this problem.

[juicycleff]

Me too, for now, I am using my repo, can't wait for it to be merged in

[pichillilorenzo]

Thanks @juicycleff! I will release the new version 1.0.0 because, as said here:

Make sure to increment the major version of your plugin for this change and clearly document it in your plugin’s changelog. This breaking change requires manual migration for users to fix. Pub treats digits differently depending on whether a plugin is pre- or post-1.0.0. The very first digit is the major version for plugins that are at or above 1.0.0. For plugins below 1.0.0, the middle digit is considered to the major version.

[pichillilorenzo]

I released the new version 1.0.0!