fix dependencies

Author: fabiommendes

setup.cfg

@@ -18,8 +18,8 @@ classifiers =
  License :: OSI Approved :: BSD License
  Programming Language :: Python
  Programming Language :: Python :: 3
- Programming Language :: Python :: 3.5
  Programming Language :: Python :: 3.6
+ Programming Language :: Python :: 3.7
  Operating System :: OS Independent
  Topic :: Internet :: WWW/HTTP
  Topic :: Internet :: WWW/HTTP :: Dynamic Content
@@ -32,7 +32,7 @@ zip_safe = False
 platforms = all
 include_package_data = True
 install_requires =
- sidekick ~= 0.4.2
+ sidekick >= 0.4.2
  markupsafe ~= 1.0
 
 
@@ -48,7 +48,7 @@ docs =
  sphinx_rtd_theme
  docutils ~= 0.14
  sphinx-autobuild ~= 0.7
-full =
+extra =
  bleach
  lxml
  Markdown