tree 8e0e86aaf2eaa6e864921abbbce88f702e12897c
parent e9406bc209a2a7fce4b8bd627218f339435acf31
author stuartmorgan <stuartmorgan@google.com> 1674757721 -0800
committer GitHub <noreply@github.com> 1674757721 -0500
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[tool/ci] Add minimum supported SDK validation (#7028)

Adds options to `pubspec.yaml` to check that the minimum supported SDK range for Flutter/Dart is at least a given version, to add CI enforcement that we're updating all of our support claims when we update our tested versions (rather than it being something we have to remember to do), and enables it in CI.

As part of enabling it, fixes some violations:
- path_provider_foundation had been temporarily dropped back to 2.10 as part of pushing out a regression fix.
- a number of examples were missing Flutter constraints even though they used Flutter.
- the non-Flutter `plugin_platform_interface` package hadn't been update since I hadn't thought about Dart-only constraints in the past.