chore: bump version to v0.2.1

Switch upstream to https://github.com/frotms/PaddleOCR2Pytorch

Merge pull request #7 from pk5ls20/imgaug

Remove an unused dependency: imgaug

Merge pull request #6 from pk5ls20/hv0905-patch-1

Use opencv-python-headless for dependency instead of opencv-python

Fix a problem when packing

Update publish-to-pypi.yml

Allow manually triggered releases

try to fix ci