Updated version history

Updated version_history.md to include fixes and enhancements on v0.15.0

Author: rvelaVenafi

docs/version_history.md

@@ -2,8 +2,16 @@
 
 ## Version History
 
+#### 0.15.0
+* Fixed **[Issue 100](https://github.com/Venafi/vcert-python/issues/100)**: Updated behavior for 'serviceGenerated' attribute on VaaS
+* Fixed **[Issue 101](https://github.com/Venafi/vcert-python/issues/101)**: Added support for the following Subject Alternative Names when creating a policy on VaaS: email, IP, URI
+* Closed **[Issue 102](https://github.com/Venafi/vcert-python/issues/102)**: Added support for EC private keys on VaaS
+* Closed **[Issue 108](https://github.com/Venafi/vcert-python/issues/108)**: Added ability to add contacts(TPP)/owners(VaaS) to a policy when is created
+* Closed **[Issue 113](https://github.com/Venafi/vcert-python/issues/113)**: Added support for legacy PKCS1 format on private keys when requesting a certificate. Default now is PKCS8 for both TPP and VaaS
+* Closed **[Issue 116](https://github.com/Venafi/vcert-python/issues/116)**: Added ability to disable the following Subject fields when creating a policy on VaaS: organizations, org units, localities, states, countries
 #### 0.14.0
 * **Dropped support for Python2. New baseline is Python 3.6+**
 * Minor bug fixes on Policy Management
 * Added integration with sonarcloud for code analysis
 * Created version history file
+