chore: set version to 4.0.2

Author: cole

src/aiosmtplib/__init__.py

@@ -34,7 +34,7 @@
 
 
 __title__ = "aiosmtplib"
-__version__ = "4.0.2dev0"
+__version__ = "4.0.2"
 __author__ = "Cole Maclean"
 __license__ = "MIT"
 __copyright__ = "Copyright 2022 Cole Maclean"