allowing more than 9 types of policies/requests

[etienne-lebrun]

With the current implementations, policies above p10 and requests above r10 do not work.
This is because these regexps only keeps a single digit: 
https://github.com/casbin/pycasbin/blob/a16bfaa669c37ac1598684e36b0319430ab749e5/casbin/util/util.py#L23
https://github.com/casbin/pycasbin/blob/a16bfaa669c37ac1598684e36b0319430ab749e5/casbin/util/util.py#L30
simply replacing the question mark by a star eval_p = re.search(r"\bp(\d*)\.", s) would allow to support more than 9 policies

[casbin-bot]

@ffyuanda @Zxilly @techoner @elfisworking

[leeqvip]

@etienne-lebrun It has been fixed.

[github-actions]

🎉 This issue has been resolved in version 1.15.3 🎉

The release is available on:

• v1.15.3
• GitHub release

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