Bump version to 4.0.0

Author: Xyene

setup.py

@@ -161,7 +161,7 @@ def unavailable(self, e):
 
 setup(
     name='dmoj',
-    version='3.0.2',
+    version='4.0.0',
     packages=find_packages(),
     package_data={
         'dmoj.cptbox': ['syscalls/aliases.list', 'syscalls/*.tbl'],