version incompatibility with Ogurets 4.0.1

[alandotic]

I got this while trying to install this extension as mentioned in the doc here : https://pub.dev/packages/ogurets

Because no versions of ogurets match >4.0.1 <5.0.0 and ogurets 4.0.1 depends on logging ^1.0.0, ogurets ^4.0.1 requires logging ^1.0.0.
And because every version of ogurets_flutter depends on logging ^0.11.3+2, ogurets ^4.0.1 is incompatible with ogurets_flutter.
So, because my_proj depends on both ogurets ^4.0.1 and ogurets_flutter any, version solving failed.
pub get failed (1; So, because my_proj depends on both ogurets ^4.0.1 and ogurets_flutter any, version solving failed.)

[vergissberlin]

Merge request #15