[google_maps_flutter] Add steps to set up google map sdk on each plat…

…form in readme. (flutter#2507)

[webview_flutter] Fix iOS WebView not opening href with target="_blan…

…k" (flutter#2500)

Right now, flutter webview on Android will open href's with target="_blank", but iOS will not. This PR fixes this.

[url_launcher_web] Added support for mailto in url_launcher_web plugin (

flutter#2490)

* Unit tests
* Updated version and CHANGELOG

[in_app_purchase] Fix wrong _pendingCompletePurchase flag value (flut…

…ter#2504)

[google_maps_flutter] Fixes toggling traffic layer not working on And…

…roid (flutter#2497)

[google_maps_flutter] supports v2 android embedding. (flutter#2488)

[Closed Captioning] Create SubRip file parser and dart closed caption…

… data object (flutter#2473)

This PR specifies a dart object that represents a "Closed Caption". This will be useful in a follow up PR, where I will add closed caption support the the `VideoPlayerController`.

[path_provider] now supports getDownloadsDirectory() on macOS. (flutt…

…er#2436)

Adds support for retrieving a user's downloads directory on macOS using the path_provider plugin.

[path_provider] now supports getDownloadsDirectory() on macOS. (flutt…

…er#2436)

Adds support for retrieving a user's downloads directory on macOS using the path_provider plugin.

[path_provider] now supports getDownloadsDirectory() on macOS. (flutt…

…er#2436)

Adds support for retrieving a user's downloads directory on macOS using the path_provider plugin.