IWF-1007: Bump iwf-python-sdk release version to v0.12.0 (#114)

* IWF-1007: Bump iwf-python-sdk release version to v0.12.0

* IWF-1007: update readme

Author: dlukiantsev

README.md

@@ -4,7 +4,7 @@
 Python SDK for [iWF workflow engine](https://github.com/indeedeng/iwf)
 
 ```
-pip install iwf-python-sdk==0.11.2
+pip install iwf-python-sdk==0.12.0
 ```
 
 See [samples](https://github.com/indeedeng/iwf-python-samples) for use case examples.

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "iwf-python-sdk"
-version = "0.11.2"
+version = "0.12.0"
 description = ""
 authors = ["Indeed Engineering"]
 readme = "README.md"