fix(types): explicit reexport & strict equality. <!-- Thank you for contributing to Pyodide! All improvements are welcome,
     so don't be afraid to make a PR. -->

### Description

<!-- Please explain what your PR is about:
     - reasoning for the change
     - some details of updated code
     - any noteworthy choices to be aware of
	Please refer to any related issues by #<issue_id> -->

Enabling two more strictness flags.

package:
  name: demes
  version: 0.2.2
source:
  url: https://files.pythonhosted.org/packages/2f/e4/86796d77ea453aa96f1ce758b461cdf738177f441a18c832cc9f29848903/demes-0.2.2-py3-none-any.whl
  sha256: 54f0110e9f1b5167347fb4793f0b1d297a58dfe3857f5e5287762aa50dea6036
requirements:
  run:
    - attrs
    - ruamel
test:
  imports:
    - demes
about:
  home: https://github.com/popsim-consortium/demes-python
  PyPI: https://pypi.org/project/demes
  summary: tools for describing demographic models
  license: ISC

package:
  name: demes
  version: 0.2.2
source:
  url: https://files.pythonhosted.org/packages/2f/e4/86796d77ea453aa96f1ce758b461cdf738177f441a18c832cc9f29848903/demes-0.2.2-py3-none-any.whl
  sha256: 54f0110e9f1b5167347fb4793f0b1d297a58dfe3857f5e5287762aa50dea6036
requirements:
  run:
    - attrs
    - ruamel
test:
  imports:
    - demes
about:
  home: https://github.com/popsim-consortium/demes-python
  PyPI: https://pypi.org/project/demes
  summary: tools for describing demographic models
  license: ISC
