Drop Python 2.6/2.7 Support and Python < 3.5

[Cellebyte]

Dropped Version Support

Because of EOL of Python 2.7

• 2.6
• 2.7

Note: in favor of the Python 2.7 EOL i want to drop Python2.x support completely.

Because of extra dependency on typings, pip3 install typing is necessary.

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4

NOTE: It is also not possible for me to support Python < 3.5 if I want to have typings in the library.
Their is a backport available, but it does not support everything pip3 install typing
I will not test compliance with these old versions.