Http add verbs LINK and UNLINK

[gam6itko]

Why?

In FOSRestBundle we have support of LINK and UNLINK verbs.

But if I use this HTTP methods in sf3 then I get error

[Spiral\Router\Exception\RouteException]
Invalid HTTP verb `LINK` in vendor/spiral/framework/src/Router/src/Traits/VerbsTrait.php:25

https://www.w3.org/Protocols/HTTP/Methods/Link.html
https://www.w3.org/Protocols/HTTP/Methods/Unlink.html

[gam6itko]

prefer lowest

spiral/attributes              3.1.8 PHP attributes reader
spiral/code-style              2.2.2 Code style and static analysis tools rulesets collection
spiral/composer-publish-plugin 1.1.2
spiral/nyholm-bridge           1.3.0 Spiral Framework: Nyholm PSR-7/PSR-17 bridge
spiral/testing                 2.8.3 Spiral Framework testing SDK
spiral/validator               1.5.4 Nested validation, Checkers, Conditional Validation

prefer stable

spiral/attributes              3.1.8 PHP attributes reader
spiral/code-style              2.2.2 Code style and static analysis tools rulesets collection
spiral/composer-publish-plugin 1.1.2
spiral/nyholm-bridge           1.3.0 Spiral Framework: Nyholm PSR-7/PSR-17 bridge
spiral/testing                 2.9.0 Spiral Framework testing SDK
spiral/validator               1.5.4 Nested validation, Checkers, Conditional Validation