Update README.md

Author: tirthajyoti

README.md

@@ -9,7 +9,7 @@
 ---
 
 ## Requirements
-* **Python 3.5+**
+* **Python 3.6+**
 * **NumPy (`pip install numpy`)**
 * **Pandas (`pip install pandas`)**
 * **Scikit-learn (`pip install scikit-learn`)**