Pyotdr

Fix weird bug with some sor file which lead to seeking negative value in the file.

Fix the case-sensitive declared in 9.

What's new

* Drop python2 support
* Add type annotation
* Drop lazyxml dependencies (easier install)

Breaking change

To use pyOTDR in your python code you'll need to do:


from pyotdr.read import read

Fix bug in 2.7. It uses timezone from datetime which exist only after 3.2

This release is the last targeting python2.