Fix for issue 3202 Updated dependencies on setup.py -fixes issues with sphinxcontrib-spelling

Fixes sphinxcontrib-spelling is throwing an error when installing from setup.py

CONTRIBUTORS.rst

@@ -192,6 +192,7 @@ Contributors
 * PyMan Claudio Marinozzi
 * Jeffrey Chau
 * Craig Loftus
+* MattRijk
 
 Translators
 ===========

setup.py

@@ -53,11 +53,11 @@ testing_extras = [
 
 # Documentation dependencies
 documentation_extras = [
+    'pyenchant==1.6.6',
+    'sphinxcontrib-spelling>=2.3.0',
     'Sphinx>=1.3.1',
     'sphinx-autobuild>=0.5.2',
     'sphinx_rtd_theme>=0.1.8',
-    'sphinxcontrib-spelling==2.1.1',
-    'pyenchant==1.6.6',
 ]
 
 setup(