* Fix issue 1331: using both `--enable-bcc` and `--assert-call` results in protection error
* Fix issue 1340: using option `--peroid` raises exception
* Fix issue 1349: install package `pyarmor.cli` failed because of invalid entry point
* Add new command `pyarmor-auth` to support unlimited docker for group license, it equals `python -m pyarmor.cli.docker`, refer to [using Pyarmor License](https://pyarmor.readthedocs.io/en/v8.2.9/how-to/register.html#run-unlimited-dockers-in-offline-device)
* Document usage of option `--exclude`, refer to [man page](https://pyarmor.readthedocs.io/en/v8.2.9/reference/man.html#cmdoption-pyarmor-gen-exclude)
* Refine folder structure of package, change source path from `src` to `pyarmor`