Bump regipy from 3.1.6 to 4.0.0 in /requirements

Bumps [regipy](https://github.com/mkorman90/regipy) from 3.1.6 to 4.0.0.
- [Release notes](https://github.com/mkorman90/regipy/releases)
- [Commits](mkorman90/regipy@3.1.6...4.0.0)

---
updated-dependencies:
- dependency-name: regipy
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/base.txt

@@ -106,7 +106,7 @@ clamdpy==0.1.0.post1
 # https://github.com/VirusTotal/vt-py
 vt-py==0.18.0
 # https://github.com/mkorman90/regipy/
-regipy==3.1.6
+regipy==4.0.0
 # http://www.capstone-engine.org/
 capstone==5.0.1
 # https://github.com/Julian/jsonschema