Add a command to force reanalysis

Fixes Dart-Code#2698.

Prepare v3.13.2

Prepare v3.13.1

Prepare v3.13.0

Require VS Code v1.47.0

Ensure LSP server stderr is logged

Fixes Dart-Code#2633.

Prepare v3.12.2

Fix tests for Snap

Fix launching of driver instrumented apps

Only normalise newlines for Flutter machine processes

Otherwise this may affect bytes that match \r in unicode characters.