Bump version

Author: Dorthu

setup.py

@@ -30,7 +30,7 @@ def get_test_suite():
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='4.1.8b0',
+    version='4.1.8b1',
 
     description='The official python SDK for Linode API v4',
     long_description=long_description,