* Upgrade everything except matcher.
* Roll matcher (and test)
* Adjust tests that depend on flutter:test directly to depend on a shim
* Require use of package:test shim and remove other references to package:test
* Use engine-built dart sdk
* Download dart-sdk from engine
* Move up deps to fix dart sdk constraint problem
* Update update_dart_sdk.ps1 for Windows
* Fix tests so they pass analysis
* More types for tests
* Roll engine
* Update dart sdk stamp location in flutter.bat
* Add newline
* Change async stubbing to use thenAnswer.
Mockito now prohibits calling thenReturn with Futures and Streams. dart-lang/mockito#79
* Update all Mockito deps to 3.0.0.
* Revert "Update all Mockito deps to 3.0.0."
This reverts commit e8ab9d37c33d3d7fe384abde64ea5b4d72623c75.
I did not correctly update the mockito dep, and there's no easy way to update to 3.0 alpha right now.
* Change thenAnswer((_) => to thenAnswer((invocation) =>
* Add Invocation type to thenAnswer lambdas
Relocates two tests alongside other related tests:
* moved code_signing_test.dart alongside other lib/src/ios tests
* moved terminal_test.dart alongside other lib/src/base tests
