Bump version from 1.3.0 to 1.4.0

Author: garlontas

pystreamapi/__init__.py

@@ -1,5 +1,5 @@
 from pystreamapi.__stream import Stream
 from pystreamapi._streams.error.__levels import ErrorLevel
 
-__version__ = "1.3.0"
+__version__ = "1.4.0"
 __all__ = ["Stream", "ErrorLevel"]