Bump pimple/pimple from 3.3.0 to 3.3.1

Bumps [pimple/pimple](https://github.com/silexphp/Pimple) from 3.3.0 to 3.3.1.
- [Release notes](https://github.com/silexphp/Pimple/releases)
- [Changelog](https://github.com/silexphp/Pimple/blob/master/CHANGELOG)
- [Commits](https://github.com/silexphp/Pimple/compare/v3.3.0...v3.3.1)

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -29,7 +29,7 @@
         "christian-riesen/otp" : "1.4.3",
         "eluceo/ical": "0.16.1",
         "erusev/parsedown" : "^1.7",
-        "pimple/pimple" : "3.3.0",
+        "pimple/pimple" : "3.3.1",
         "psr/log": "~1.0",
         "swiftmailer/swiftmailer" : "5.4.8",
         "symfony/console" : "4.2.12",