Seïfane Idouchach

[FEATURE] Upgrading to DBAL 3 & Switch to symfony/cache

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### Changes proposed in this pull request: - Upgrade to DBAL3 - Use symfony/cache for cache since doctrine/cache as been deprecated - Remove usage from deprecated / deleted classes of...

It seems that APCng is not handling integers labels very well. It registers them correctly when incrementing a counter for example : ``` $counter = $registry->getOrRegisterCounter(..., ["path", "response_code"]); $counter->incBy(1, ["a/path/",...

This small PR fixes the GraphQL types and some PHP typing when generating the definitions for `LengthAwarePaginator`. Most GraphQL types should be put as non-null since the closures (and called...