Add missing deps

[Lee-W]

Description

add typing_extension to prod dep as it's required in commitizen/defaults.py

Checklist

• Add test cases to all the changes you introduce
• Run ./script/format and ./script/test locally to ensure this change passes linter check and test
• Test the changes on the local machine manually
• Update the documentation for the changes

Expected behavior

error should no longer happen

Steps to Test This Pull Request

1. poetry install
2. poetry run python commitizen/defaults.py

Additional context

#458

[codecov]

Codecov Report

Merging #459 (48f9b7e) into master (65645e0) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #459      +/-   ##
==========================================
+ Coverage   97.92%   97.96%   +0.04%     
==========================================
  Files          39       39              
  Lines        1395     1424      +29     
==========================================
+ Hits         1366     1395      +29     
  Misses         29       29              

Flag	Coverage Δ
unittests	97.96% <100.00%> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
commitizen/changelog.py	95.77% <ø> (ø)
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/bump.py	100.00% <100.00%> (ø)
commitizen/commands/init.py	91.66% <100.00%> (ø)
commitizen/config/base_config.py	100.00% <100.00%> (ø)
commitizen/config/json_config.py	100.00% <100.00%> (ø)
commitizen/config/toml_config.py	100.00% <100.00%> (ø)
commitizen/config/yaml_config.py	100.00% <100.00%> (ø)
commitizen/cz/base.py	100.00% <100.00%> (ø)
...en/cz/conventional_commits/conventional_commits.py	100.00% <100.00%> (ø)
... and 5 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bd7e866...48f9b7e. Read the comment docs.

[woile]

I will manually bump 😅 as the previous version doesn't work