feat: shorebird upgrade should compile shorebird

[eseidel]

I believe flutter upgrade does this. Right now when you run shorebird upgrade it will replace your shorebird, but not recompile it. This means that the next time you run a shorebird command it does the compile.

Maybe the fix for this and #288 is to just have it run shorebird --version?

[eseidel]

It should also compile flutter. Otherwise you can get awkward later compiles of Flutter, like when you run shorebird doctor:

eseidel@Erics-MacBook-Pro test_app % shorebird doctor

Shorebird v0.0.5

✓ Flutter install is correct (23.4s)
✓ AndroidManifest.xml files contain INTERNET permission (29ms)
✓ Shorebird is up-to-date (0.3s)

No issues detected!

[eseidel]

And call flutter --version to compile flutter.

[yahu1031]

Wasn't this fixed?

Hoping a simple and feasible solution is in upgrade_command.dart

++ await doctor.runValidators(doctor.allValidators, applyFixes: false); // No need to apply any fixes. Just a doctor is fine like flutter does.

updateProgress.complete('Updated successfully.');

return ExitCode.success.code;

@eseidel @felangel

[bryanoltman]

Originally thought this would be part of #2184, but was wrong. Unassigning for now.