Relax dependency version range on eight

Author: kislyuk

setup.py

@@ -13,7 +13,7 @@
     long_description=open('README.rst').read(),
     install_requires=[
         'lxml >= 4.2.1, < 5',
-        'eight >= 0.4.2, < 1',
+        'eight >= 0.4.2, < 2',
         'cryptography >= 2.1.4, < 3',
         'asn1crypto >= 0.24.0',
         'pyOpenSSL >= 17.5.0, < 20',