[release] Update version to 0.2.dev0

This repo is for Apache Paimon Python SDK.
Flake8 is used to enforce some coding guidelines.
pip install flake8./usr/bin/python.-m flake8 --config=tox.ini.$ProjectFileDir$.You can verify the setup by right-clicking on any file or folder in the flink-python project and running “External Tools” → “flake8”.
We provide script to check codes.
./dev/lint-python.sh # execute all checks ./dev/lint-python.sh -h # run this to see more usages
We provide script to build wheel.
./dev/build-wheels.sh
The target wheel is under dist/
See Apache Paimon Python API Doc.