Yehua

. updated yaml library to ruamel.yaml. PyYAML is out because only one yaml
library is wanted in the organisation.

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**Updated**

. `53 <https://github.com/moremoban/yehua/issues/53>`_: parity with
cookiecutter: support gh:audreyr/cookiecutter-pypackage

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**Updated**

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**Fixed**

. support pypi-mobans v0.0.15.
. auto-generation of contributors
. github action for moban update and commits
. better isort action

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**Fixed**

. `62 <https://github.com/moremoban/yehua/issues/62>`_: fix unwanted
dependency for yh standalone use

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**Removed**

. python 2 support has been dropped

**Updated**

. -v is changed to do moban style verbose(-v, -vv, -vvv), for version, please
use -V

**Added**

. `37 <https://github.com/moremoban/yehua/issues/37>`_: cookiecutter support
. `38 <https://github.com/moremoban/yehua/issues/38>`_: non-verbose mode
. added moban update work flow
. python filesystem 2 support. yehua templates and cookiecutter templates can
be in git, zip, s3, etc.