Update sslyze requirement from <5.0.0,>=3.0.0 to >=3.0.0,<7.0.0

Updates the requirements on [sslyze](https://github.com/nabla-c0d3/sslyze) to permit the latest version.
- [Release notes](https://github.com/nabla-c0d3/sslyze/releases)
- [Commits](nabla-c0d3/sslyze@3.0.0...6.0.0)

---
updated-dependencies:
- dependency-name: sslyze
  dependency-type: direct:production
...

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

setup.py

@@ -100,7 +100,7 @@ def get_version(version_file):
         "requests>=2.18.4",
         # This is necessary to support the python_requires kwarg
         "setuptools >= 24.2.0",
-        "sslyze>=3.0.0,<5.0.0",
+        "sslyze>=3.0.0,<7.0.0",
         "wget>=3.2",
     ],
     extras_require={