* 982e1ca54 [path_provider] Migrate examples to null-safety (flutter/plugins#3559)

* e8b38f6e0 [image_picker_for_web] Add doc comments to point out that some arguments aren't supported on the web (flutter/plugins#3566)

* 849f25818 [google_maps_flutter] Migrate to NNBD (flutter/plugins#3548)

* 231553133 [url_launcher] Bump platform interface package to stable NNBD (flutter/plugins#3570)

* 0638189d6 [in_app_purchase]  Migrate to NNBD (flutter/plugins#3555)

* 6c10217bb [path_provider] Bump platform interface package to stable NNBD (flutter/plugins#3568)

* 51c6eac1a [flutter_plugin_android_lifecycle] Bump version for NNBD stable (flutter/plugins#3569)

* 72cbcacfe [package_info] Bump version for NNBD stable (flutter/plugins#3571)

* 4f31f3fa6 [image_picker_platform_interface] Bump NNBD version to stable (flutter/plugins#3573)

* 5817241b8 [flutter_plugin_android_lifecycle-sdk] Update Flutter SDK constraint

* 8e3893502 [path_provider] Bump platform packages to NNBD stable (flutter/plugins#3575)

* f6c2ed4f3 [image_picker] use nnbd version of deps to resolve ci failure (flutter/plugins#3580)