fix: session expire date parsing

[Titotix]

No description provided.

[zamzterz]

Thanks for your contribution - great start! 👍

As mentioned in #106, it would be fine to drop testing against Python 3.5 in this PR. And it would be great to also combine it with #105 to get the tests passing again with a single PR.

[codecov-commenter]

Codecov Report

Merging #104 (6adc1ca) into master (ab0e9b3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #104   +/-   ##
=======================================
  Coverage   97.96%   97.96%           
=======================================
  Files           9        9           
  Lines         591      591           
  Branches       61       61           
=======================================
  Hits          579      579           
  Misses          7        7           
  Partials        5        5           

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[Titotix]

I had a commit to drop Python3.5 support.
But this #105 doesn't fix anything actually, it was to test if the upgrade of pip was enough to fix the missing Rust compiler for cryptography lib but it is not and I did not dig more in it. According to the cryptography doc :

If you are on RHEL/CentOS/Fedora/Debian/Ubuntu or another distribution derived from the preceding list, then you should upgrade pip (in a virtual environment!) and attempt to install cryptography again before trying to install the Rust toolchain. These platforms will receive a binary wheel and require no compiler if you have an updated pip!

But I am not used to travis and I didn't look for which platform it uses to run the test.

[zamzterz]

After a closer look, and combining your 2 PRs with a small addition the tests are now working again.
I took the liberty of creating a PR out of that which I'd be happy if you took a quick look at: #107