Upgrade android internals and handle obfuscation (#53)

* Upgrade streams_channel to 0.3.0.

* Add infos to android obfuscation in readme.

* Codegen for moshi json.

* Update changelog.

* Clean.

* Readme typo.

Update gradle wrapper to v5.6.2.

Improve permissions (#52)

* Differenciate permission not granted / permission denied (wip).

* Upgrade project structure to post v1.12.

* Clean.

* Update changelog.

* Update readme.

* Open settings if denied for android.

* Update description.

* Add plateforms to pubspec.

Fix Accuracy.nearestTenMeters on iOS. Update changelog and bump to v1…

….0.2.

Update streams_channel to 0.2.3. Bump version to 1.0.1.

Update changelog.

Update readme.

Bump version to v0.2.0.

Update readme.

Initial commit.