update package version in readme as well

Author: MalteKurz

README.md

@@ -91,7 +91,7 @@ If you use the DoubleML package a citation is highly appreciated:
 Bach, P., Chernozhukov, V., Kurz, M. S., and Spindler, M. (2020),
 DoubleML - Double Machine Learning in Python.
 URL: [https://github.com/DoubleML/doubleml-for-py](https://github.com/DoubleML/doubleml-for-py),
-Python-Package version 0.1.0.
+Python-Package version 0.1.2.
 
 Bibtex-entry:
 
@@ -100,7 +100,7 @@ Bibtex-entry:
   title = {DoubleML - Double Machine Learning in Python},
   author = {Bach, P., Chernozhukov, V., Kurz, M. S., and Spindler, M.},
   year = {2020},
-  note = {URL: \url{https://github.com/DoubleML/doubleml-for-py}, Python-Package version 0.1.0}
+  note = {URL: \url{https://github.com/DoubleML/doubleml-for-py}, Python-Package version 0.1.2}
 }
 ```