fix: lock the cloud sdk library version

Author: mamoonraja

setup.py

@@ -64,7 +64,7 @@ def run_tests(self):
       version=__version__,
       description='Client library to use the IBM Watson Services',
       license='Apache 2.0',
-      install_requires=['requests>=2.0, <3.0', 'python_dateutil>=2.5.3', 'websocket-client==0.48.0', 'ibm_cloud_sdk_core==1.5.1'],
+      install_requires=['requests>=2.0, <3.0', 'python_dateutil>=2.5.3', 'websocket-client==0.48.0', 'ibm_cloud_sdk_core==1.7.3'],
       tests_require=['responses', 'pytest', 'python_dotenv', 'pytest-rerunfailures', 'tox'],
       cmdclass={'test': PyTest},
       author='IBM Watson',