[BUG] Comatibility with Dart 2.17 & analyzer 4.0

[roman-petrov]

I have a problem using build_runner + dart_code_metrics on my codebase which uses new super parameters feature introduced in Dart 2.17.

The problem is that dart_code_metrics currently has a restriction for analyzer: ">=2.4.0 <3.4.0" so the analyzer package can not be resolved to 4.0.0 and build_runner fails when sees super parameters in code. Can we upgrade analyzer upper bound to 4.0.0?

[incendial]

Should be fixed in 4.15.1