v0.11.0+3

• Fixes an Android crash when reusing Native and Banner Ad objects.
• Fixes iOS memory leaks.
• Adds a section on Ad Manager to the README.
• Updates iOS setup in the README to include SKAdNetwork.

v0.11.0+2

• Set min Android version to 19.
• Fixes bug that displayed "This AdWidget is already in the Widget tree".
• Update minimum gradle version.
• Add references to the codelab in the README.

v0.11.0

Open beta release of this plugin. See the README for integration steps.