Extract type cast behaviour

[zluiten]

By extracting the type casting to its own class it can be easily replaced when needed. Preferring composition over inheritance etc.

It becomes better testable as well.

I tried to keep BC by proxying to the TypeCaster and instantiating the TypeCaster in the AbstractFilter::getTypeCaster() method when not set in case FilterManager::filter() method is overridden.

[coveralls]

Coverage decreased (-66.2%) to 14.427% when pulling b20a1a0 on netiul:feature/extract-type-casting into cca97a6 on zfcampus:master.

[weierophinney]

This repository has been closed and moved to laminas-api-tools/api-tools-doctrine-querybuilder; a new issue has been opened at laminas-api-tools/api-tools-doctrine-querybuilder#1.

[weierophinney]

This repository has been moved to laminas-api-tools/api-tools-doctrine-querybuilder. If you feel that this patch is still relevant, please re-open against that repository, and reference this issue. To re-open, we suggest the following workflow:

• Squash all commits in your branch (git rebase -i origin/{branch})
• Make a note of all changed files (`git diff --name-only origin/{branch}...HEAD
• Run the laminas/laminas-migration tool on the code.
• Clone laminas-api-tools/api-tools-doctrine-querybuilder to another directory.
• Copy the files from the second bullet point to the clone of laminas-api-tools/api-tools-doctrine-querybuilder.
• In your clone of laminas-api-tools/api-tools-doctrine-querybuilder, commit the files, push to your fork, and open the new PR.
  We will be providing tooling via laminas/laminas-migration soon to help automate the process.