Datamodel-code-generator

- Refactor data_type_manager [384]
- Fix to parse enum correctly [383]
- Allow using Literal in python 3.7 via typing_extensions backport [382] by yuyupopo
- Update dependencies [378]

Thanks to yuyupopo

- Improve resolving module names [377]
- Refactor DataModel [376]
- Improve code style [375]

- Improve typing [373]
- Fix x-enum-varnames for string [372]

- Escape special characters in regex [370]
- Support strict types [369]
- Add --disable-appending-item-suffix [368]
- Strip constraints on self-reference [367]
- Fix custom_root_model [366]
- Support HTTP URL as an input [365]

- Fix model name which is same imported_name [364]
- Fix broken update_forward_refs [363]
- Improve coding style [362]
- Change all imports return type to iterator[Import] [361]
- Lazy creating imports and unresolved_types [360]
- Resolve parent model by data_type [359]
- Model properties are generated when rendering [358]
- Refactoring model structure [354]

breaking change
The detail is in https://github.com/koxudaxi/datamodel-code-generator/issues/357

- Support nested json_pointer [352]