Updating version and setup.py classifier. [skip ci]

Author: mindflayer

mocket/__init__.py

@@ -7,4 +7,5 @@
 
 __all__ = (mocketize, Mocket, MocketEntry, Mocketizer)
 
-__version__ = "3.7.0"
+__version__ = '3.7.0'
+

setup.py

@@ -57,6 +57,7 @@ def read_version(package):
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Software Development',