fix(19-default-global-errors): set value from None to empty dictionary (#20)

This commit bears the change of setting the default value of global errors from None to an empty dictionary in the global configuration class.

closes #19

Author: sufyankhanrao

apimatic_core/configurations/global_configuration.py

@@ -26,7 +26,7 @@ def __init__(
             self, http_client_configuration=HttpClientConfiguration()
     ):
         self._http_client_configuration = http_client_configuration
-        self._global_errors = None
+        self._global_errors = {}
         self._global_headers = {}
         self._additional_headers = {}
         self._auth_managers = {}

setup.py

@@ -12,7 +12,7 @@
 
 setup(
     name='apimatic-core',
-    version='0.1.2',
+    version='0.1.3',
     description='A library that contains core logic and utilities for '
                 'consuming REST APIs using Python SDKs generated by APIMatic.',
     long_description=long_description,