Pyvcd

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* Drop official support for EOL Python 3.6 (25)
* Add official support for Python 3.10 and 3.11
* Identifiers may have parens (21)
* Repair typing issue in vcd.gtkw.decode_flags()
* Repair sphinx config warnings
* Build using `build` instead of executing setup.py
* Repair deprecated use of license_file in setup.cfg

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* Add vcd.reader module for parsing VCD files
* Various repairs to vcd.gtkw docs
* Update setuptools and setuptools_scm requirements

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* Escape special characters in (GTKWave) string vars (17)
* Update package classifiers for for Python 3.9 support

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* Add long_description_content_type to setup.cfg

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* Add register_alias() for creating aliases to VCD variables (15).

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* Add python_requires >=3.6 to setup
* Packaging changes related to PEP-517