* enable always_require_non_null_named_parameters lint

* Update home.dart

Also includes minor doc fixes.

Also fixes a small typo.

And add a script to rev the versions.

Turns out that `[]:` means something in markdown, so you have to
escape the `:` with a backslash.

It wasn't tested, which is why it didn't work before.

Now that we can host packages on pub that depend on Flutter, we can host
flutter_markdown in its own git repository.

Corrects type from string introduced in
21712a49.

Fixes https://github.com/flutter/flutter/issues/9929

Fixes #9866

Add a flutter doctor --android-licenses command that locates and runs the Android SDK license manager (#9892)

See https://github.com/flutter/flutter/issues/8438

* Roll android build tools to 25.0.3

* Roll android build tools to 25.0.3 in templates

This reverts commit 4bbf158b.

Provides a cue to the engine to disable auto-correct/suggest.

* Enforce valid package names on flutter create

Fixes #9564

* refactor

* fix other tests

Spawned from a discussion in https://github.com/flutter/flutter-intellij/pull/1003

This reverts commit 5ed2984e.

* record doctor failures

* fully mock out analytics dependencies

* handle errors

* review notes