value of python_requires does not comply with PEP 345/440

[ITProKyle]

yamllint/setup.cfg

Line 49 in 85ccd62

python_requires = >=3.5.*

According to PEP 345 Requires-Python, the value of this field must be a valid Version Specifier. Which in turn expects this to comply with PEP 440.

While not an issue for those that directly use pip, this will cause issues for poetry users in the next release (if their current stance is maintained). Discussion of the issue and there stance can be found here: python-poetry/poetry#4095.