Update to Dart 2.0

[unicomp21]

No description provided.

[robertmuth]

this should be fixed now - please confirm

[unicomp21]

very close, looks like 1 error left from analysis server ... thanks!

error: Missing parameter type for 'succ'. (strong_mode_implicit_dynamic_parameter at [chronosgl] example/midi_input/midi_input.dart:8)
info: Unused import: 'dart:js'. (unused_import at [chronosgl] example/game/game.dart:4)
info: Unused import: 'dart:async'. (unused_import at [chronosgl] example/midi_input/midi_input.dart:4)
info: The value of the local variable 'elapsed' isn't used. (unused_local_variable at [chronosgl] example/midi_input/midi_input.dart:27)
info: The value of the field '_currentControlValue' isn't used. (unused_field at [chronosgl] lib/src/webhelper/midi_input.dart:4)
info: Use collection literals when possible. (prefer_collection_literals at [chronosgl] lib/src/webhelper/midi_input.dart:4)
info: The value of the field '_justUpdatedControls' isn't used. (unused_field at [chronosgl] lib/src/webhelper/midi_input.dart:5)

[unicomp21]

Hitting this too ...

/usr/lib/dart/bin/pub global run webdev serve example:33189
webdev could not run for this project.
The build_runner version – 0.10.1 – is not within the allowed constraint – >=0.8.10 <0.10.0.
Dart Dev Server terminated

[robertmuth]

you can avoid the midi issue by just deleting the example - there is an sdk issue upstream so it does not work anyway.

for the build_runner - just weaken the constraints in pubspec.yaml and re-run "make get"