fix(core): Update core versions

Author: ehdsouza

requirements-dev.txt

@@ -5,7 +5,7 @@ python_dotenv>=0.1.5;python_version!='3.2'
 pylint>=1.4.4
 tox>=2.9.1
 pytest-rerunfailures>=3.1
-ibm_cloud_sdk_core>=0.5.1
+ibm_cloud_sdk_core==1.0.0rc1
 
 # code coverage
 coverage<5

setup.py

@@ -63,7 +63,7 @@ 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>=0.5.1'],
+      install_requires=['requests>=2.0, <3.0', 'python_dateutil>=2.5.3', 'websocket-client==0.48.0', 'ibm_cloud_sdk_core==1.0.0rc1'],
       tests_require=['responses', 'pytest', 'python_dotenv', 'pytest-rerunfailures', 'tox'],
       cmdclass={'test': PyTest},
       author='IBM Watson',