Vlde

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* [Modify] min_length no longer support bool type variables
* [Modify] Required rules Verify that the variable is non-null (not none)
* [Modify] need to support validation byte type variables
* [Modify] int rule validation failed when verifying bool type
* [Modify] warning_rule defaults to True

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* Modify the structure of the import package, more convenient to use

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* Basic
* Conception