SmallInterger field type, ability to pass own pydantic config

0.10.16

✨ Features

• Allow passing your own pydantic Config to ormar.Model that will be merged with the default one by @naturalethic (thanks!) #285
• Add SmallInteger field type by @ProgrammerPlus1998 (thanks!) #297

🐛 Fixes

• Fix generating openapi schema by removing obsolete pydantic field parameters that were directly exposed in schema #291
• Fix unnecessary warning for auto generated through models #295