Make web examples runnable with latest dart

[dlchet]

• pubspec gets latest build_web_compilers
• README.md specifies working steps to run web examples
• minor linting issues are ignored

[hoc081098]

We should keep the old version of 2 deps, because we support dart >= 2.12

[dlchet]

got it. i'll see if i can rework this so the example can be run on 2.12 as well as latest.

[dlchet]

well, i'm not sure how to make the examples work with past and current versions at the same time. i'm on dart 3.3.1 and i run into issues both with the old style of building

% dart run build_runner serve example
[SEVERE] build_web_compilers:sdk_js on asset:build_web_compilers/$package$ (cached):
Error compiling dartdevc module:build_web_compilers|lib/src/dev_compiler/dart_sdk.sound.js
Unhandled exception:
PathNotFoundException: Cannot open file, path = '/opt/homebrew/Caskroom/flutter/3.3.3/flutter/bin/cache/dart-sdk/lib/_internal/ddc_platform_sound.dill' (OS Error: No such file or directory, errno = 2)

and the new style

% webdev serve example               
[SEVERE] Pubspec errors: [The `build_web_compilers` version – 3.2.7 – is not within the allowed constraint – ^4.0.4.
null]
webdev could not run for this project.
The `build_web_compilers` version – 3.2.7 – is not within the allowed constraint – ^4.0.4.

and the new style using old webdev

Activated webdev 2.7.12.
dlchet@Consolation-System rxdart % webdev serve example                  
webdev could not run for this project.
This version of webdev does not support the `build_daemon` protocol used by your version of `build_runner`.
A newer version of webdev is available which supports your version of the `build_daemon`. Please update.

So I'm a bit perplexed on what if anything should be changed. It seems to me that this problem would surface when using a recent Dart even in a separate project, so maybe I will try to make a minimal reproduction in a separate project, and then submit as an issue? @hoc081098 thank you for your attention, let me know if you see anything I'm missing

[hoc081098]

@dlchet I think we can use a separate pubspec.yaml for web example (similar to flutter/github_search).
Could you try this approach?

[hoc081098]

Thanks, but it is obsolete now, because I have converted web example to a new project (by using melos), and it can use latest version of dependencies

[dlchet]

Thanks, but it is obsolete now, because I have converted web example to a new project (by using melos), and it can use latest version of dependencies

That's great, I had meant to come back to this and do exactly that, it seems the right way forward. Appreciate your work!