[1.x] Enforce snake_case methods for PHPUnit method in Laravel preset

[timacdonald]

The Laravel preset should have an opinion on testsuite method casing.

There is always overhead involved working out what casing the testsuite is using. Often there can be multiple casings within a single testsuite. Even in our own ecosystem's packages, when contributions come from different people, we can see different casings within the one project.

The Laravel framework ships with snake casing, so I am proposing we stick with that and never have to waste brain cycles on this again for PHPUnit based testsuites.

[iBotPeaches]

Would this have made sense to become 1.19.0? - it seemed odd for a patch release (1.18.1 to 1.18.2) to throw thousands of errors since our test method names violated this default change.

[timacdonald]

@iBotPeaches, we don't see adding rules to the Laravel preset as a breaking change.

You may lock the version of Pint used in your project to only introduce new rules when you want.