Warn about 2.7 on HISTORY

Author: rafaelpivato

HISTORY.rst

@@ -10,6 +10,10 @@ History
 0.5.0 (2020-03-14)
 ------------------
 
+A bug with this package allows it to be installed on Python 2.7 environments,
+even though it should not work on such version. You should stick with version
+0.4.1 version instead for Python 2.7 support.
+
 * Dropped Python 2.7, 3.3, 3.4 support
 * Removed six package
 * Removed pinned dependencies of tests

README.rst

@@ -137,6 +137,6 @@ time, Safety itself has a commitment to encourage developers to keep their
 software up-to-date, and it would not make sense for us to work with officially
 unsupported Python versions, or even those that reached their end of life.
 
-If you still need to use Safety with Python 2.7, please use version 0.4 of
+If you still need to use Safety with Python 2.7, please use version 0.4.1 of
 Dparse available at PyPi. Alternatively, you can run Safety from a Python 3
 environment to check the requirements file for your Python 2.7 project.