* Add support for circular references in generated JSON Schema
* Update JSON Schema for referenced models with overrides, using allOf
* Add tests for circular references in Python 3.7
* Update History
* Remove unnecessary check, raise coverage (remove partial)
* Trigger Travis and others
* Use str concat expression instead of double expression in schema
Co-Authored-By: Samuel Colvin <samcolvin@gmail.com>
* Update pydantic/schema.py
Co-Authored-By: Samuel Colvin <samcolvin@gmail.com>
* Partial implementation of PR review
* Simplify definition of known_models
* Update sub_types when calling update_forward_refs(), fix#404
* Update History
* Handle deeply nested ForwardRef types in sub_types using recursion
* Move update_field_forward_refs to utils.py
* fix ForwardRef collection bug, fix#439
* reformat codes
* minor document error
* add HISTORY.rst and simplified unit test
* restore the original example for ForwardRef
* support postponed annotations in python 3.7
* support for full ForwardRef
* tweak update_forward_refs
* better ForwardRef resolution
* remove debug, fix linting
* fix comments
* docs and history
Sebastián Ramírez