Evaluate the qossmic/deptrac dev dependency

[TravisCarden]

• Part of Evaluate dev dependencies #78.

Dependency	qossmic/deptrac (via qossmic/deptrac-shim)
Description	Deptrac is a static code analysis tool that helps to enforce rules for dependencies between software layers.
Value/justification	High. Enforces the architectural/domain design. c.f. https://github.com/php-tuf/composer-stager/wiki/Software-architecture-&-design#application-architecture
Usage/popularity	Medium. Currently over 2M installs on Packagist.
Security policy	https://github.com/qossmic/deptrac/security/policy
Maintainance	Maintainers appear active and responsible. Semi-frequent, well documented releases that strictly follow semver.
Considerations	Composer Stager has very cleanly separated layers so that domain APIs are clearly exposed and implementation details are hidden. As more maintainers are added to the project, it will be important to guard this quality.

Dependency tree

$ composer info --tree qossmic/deptrac-shim
qossmic/deptrac-shim 0.24.0 deptrac phar distribution
├──ext-json *
├──ext-tokenizer *
├──ext-zlib *
└──php ^7.4 || 8.0.* || 8.1.*

[TravisCarden]

Deptrac has been removed in favor of a custom PHPCS sniff.