[various] Align Flutter and Dart SDK constraints (#3349)
As described in https://github.com/flutter/flutter/issues/121684, we currently have inconsistencies between Flutter SDK constraints and Dart SDK constraints; we have often updated only the former. This PR:
1. Adds CI enforcement via the repo tooling that the minimum versions are consistent.
2. Adds a new repo tooling command to update SDK constraints, to help mass-fix all the violations of the new enforcement in step 1 (and for future mass changes, such as when we update our test matrix and mass-drop support for versions that are no longe tested).
- In all cases, the looser constraint was updated to match the more restrictive constraint, such that there's no actual change in what Flutter version any package actually supports.
3. Runs dart fix --apply over all changed packages to automatically fix all of the analysis failures caused by step 2 suddenly making all of our packages able to use super parameters.
Fixes https://github.com/flutter/flutter/issues/121684
Fixes https://github.com/flutter/flutter/issues/121685
Standardize copyright author and year (#338)
Standardize copyright author ("The Flutter Authors") and year (2013), as was previously done in flutter/plugins.
Adds per-package AUTHORS files to ensure that published packages contain the authorship information referred to in the boilerplate (again, as in flutter/plugins).
First preparatory step in enabling the automated license format check in this repository.
[various] Align Flutter and Dart SDK constraints (#3349)
As described in https://github.com/flutter/flutter/issues/121684, we currently have inconsistencies between Flutter SDK constraints and Dart SDK constraints; we have often updated only the former. This PR:
1. Adds CI enforcement via the repo tooling that the minimum versions are consistent.
2. Adds a new repo tooling command to update SDK constraints, to help mass-fix all the violations of the new enforcement in step 1 (and for future mass changes, such as when we update our test matrix and mass-drop support for versions that are no longe tested).
- In all cases, the looser constraint was updated to match the more restrictive constraint, such that there's no actual change in what Flutter version any package actually supports.
3. Runs dart fix --apply over all changed packages to automatically fix all of the analysis failures caused by step 2 suddenly making all of our packages able to use super parameters.
Fixes https://github.com/flutter/flutter/issues/121684
Fixes https://github.com/flutter/flutter/issues/121685