Bump pysaml2 version from 4.4.0 to 4.5.0

[infinityxxx]

Safety report (pyup.io):

[
    [
        "pysaml2", 
        "<=4.4.0", 
        "4.4.0", 
        "pysaml2 version 4.4.0 and older accept any password when run with python optimizations enabled. This allows attackers to log in as any user without knowing their password.", 
        "35700"
    ], 
    [
        "pysaml2", 
        "<=4.4.0", 
        "4.4.0", 
        "Python package pysaml2 version 4.4.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data.", 
        "35699"
    ]
]

EDIT: there is related PR #114

[GertBurger]

+1

[WebSpider]

👍

[knaperek]

Please see my comment in PR #114.

[GertBurger]

Looks like it was resolved in #122

[infinityxxx]

thanks

[GertBurger]

Sorry, I meant to say that the blocker for this issue was resolved. The issue itself is still valid.