Fix parsing complex accept headers (vapor#2603)

* Add failing unit test for complex accept type

* Add test for accept preference

* Fix media type preference comparison

* Fix directive parsing for accept headers

* Cleanup

* Extend test cases

* Extend accept header test cases

Co-authored-by: Tim Condon <[email protected]>

Add expiration time to `Cache` protocol and in-memory cache. (vapor#2601

)

* Add expiry to cache protocol & in-memory cache

* Change parameter name

* Fix nits

Change 5xx logging to always be warning (vapor#2600)

Change Vapor's logging levels for errors. (vapor#2598)

* Change logging levels of report function

* Change default logLevel of DebuggableError to warning

* Change to warning for storage and dotenv

* Fix compiler error

Co-authored-by: Tim Condon <[email protected]>

Add option to configure graceful shutdown timeout (vapor#2501)

* Allow to configure graceful shutdown timeout

* Update timeout to stop tests timing out

Co-authored-by: Tim Condon <[email protected]>

Add a way to manually upgrade a request to WebSocket (vapor#2498)

* Add a way to manually upgrade a request to WebSocket

* Move Request.webSocket method to a separate file

* Add a test for manual upgrade to WebSocket

Add stack trace to `RouteNotFound` error to improve `DebuggableError`…

… conformance (vapor#2596)

* Add stack trace to RouteNotFound for DebuggableError

* Remove old typeIdentifier property

Fix: URLEncodedFormDecoder ignores empty value when decoding Array (v…

…apor#2584)

* Add test case

* Don't omit empty string when parsing unindexed array

* Refactor unindexed array parsing

* Reduce closure usage

Co-authored-by: Tim Condon <[email protected]>

Support JSONAPI content using JSONEncoder/Decoder (vapor#2486)

Co-authored-by: Tim Condon <[email protected]>

reversed shutdown order of LifecycleHandlers (vapor#2583)

Co-authored-by: Tim Condon <[email protected]>