Slim 3.3.0 released

This release tidies up a few issues found in our PSR-7 implementation around the Request's body and uploaded files. In particular, we now handle file input elements with names containing nested arrays correctly.

Added

• #1811 - Add Request::reparseBody() to provide a way to allow reparsing of the Request's body

Fixed

• #1812 - Handle nested uploaded files correctly.
• #1808 - Ensure that getParsedBody() returns null if the body cannot be parsed.