bump version to 5.1.0.b4

azure-devops/azure/devops/version.py

@@ -3,4 +3,4 @@
 # Licensed under the MIT License. See License.txt in the project root for license information.
 # --------------------------------------------------------------------------------------------
 
-VERSION = "5.1.0b3"
+VERSION = "5.1.0b4"

azure-devops/setup.py

@@ -6,7 +6,7 @@
 from setuptools import setup, find_packages
 
 NAME = "azure-devops"
-VERSION = "5.1.0b3"
+VERSION = "5.1.0b4"
 
 # To install the library, run the following
 #