Update settings.sh

Author: MacHu-GWU

bin/settings.sh

@@ -17,7 +17,7 @@ py_ver_major="3"
 py_ver_minor="7"
 py_ver_micro="9"
 use_pyenv="N" # "Y" or "N"
-supported_py_versions="2.7.13 3.4.6 3.5.3 3.6.2" # e.g: "2.7.13 3.6.2"
+supported_py_versions="3.6.2" # e.g: "2.7.13 3.6.2"
 
 
 #--- Doc Build