v4.7.0

Main features:

• Use hyperscan version 0.2.0 (i.e., based on libhyperscan5) for python3.8 (was hyperscan 0.1.5 before, based on libhyperscan4).
• Add support for python 3.10
• Abandon python 3.6, whose eol was in 2021
• Bump requirements and make Credential Digger ready for ubuntu 22.04
• Update tests
• Fix bugs

Bugfixes details:

• #183
• #200
• #214
• #224 (bug in update discoveries functions)