require.Acme/WidgetsPackage is invalid, it should not contain uppercase characters. Please use acme/widgetspackage instead.
Composer 2 is more strict than Composer 1. One of the areas are package names should use lowercase names, regardless of casing for the repository name.
While this is a warning and not an actual error, you should still resolve this by using the proper lowercase name of the package in your
composer.json requirements. If the package truly contains uppercase characters in their
composer.json, you should notify the package author of this message by opening an issue or a pull request.
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