Pylint in version 1.8.2 really depends on >=dev-python/astroid-1.6:
$ pylint
> ...
> pkg_resources.DistributionNotFound: The 'astroid<2.0,>=1.6'
> distribution was not found and is required by pylint
Closes: https://github.com/gentoo/gentoo/pull/7460
IUSE="doc examples test"
RDEPEND="
- >=dev-python/astroid-1.5.1[${PYTHON_USEDEP}]
+ >=dev-python/astroid-1.6.0[${PYTHON_USEDEP}]
dev-python/six[${PYTHON_USEDEP}]
>=dev-python/isort-4.2.5[${PYTHON_USEDEP}]
dev-python/mccabe[${PYTHON_USEDEP}]