Update version

Author: tomasbedrich

setup.py

@@ -42,7 +42,7 @@ def run(self):
 
 info = {
     "name":                "pycaching",
-    "version":             "3.6.3",  # PEP 386
+    "version":             "3.6.4",  # PEP 386
     "author":              "Tomas Bedrich",
     "author_email":        "ja@tbedrich.cz",
     "url":                 "https://github.com/tomasbedrich/pycaching",