Update ttml2str

[arvvoid]

Please check that your pull request pass this checks:

• My changes respect the Kodi add-on development rules
• My code is both Python 2 and 3 compatible
• My code follows the code style of this project (PEP8, long lines allowed if make sense)
• I made sure there wasn't another Pull Request opened for the same update/change
• I have successfully tested my changes locally

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Adding a new region/hbo go version

Description:

Fix issue #157

[arvvoid]

@rocknrollnor New test version is ready, should be ok, please test and let me know.

[arvvoid]

Leia:
plugin.video.hbogoeu-2.5.11-leia-beta4.zip

Matrix:
plugin.video.hbogoeu-2.5.11-matrix-beta4.zip

[arvvoid]

@rocknrollnor Ping, not sure if you noticed new test version :)

[arvvoid]

Hello, @Sakerdot @sanangel @PolliSoft @macardi @jhdgghost @jumakki @Evili84 @haakobja if someone has some free time I would like to ask some help in testing this.

[rocknrollnor]

It works :)

[arvvoid]

@rocknrollnor ok perfect. So the problem with subtitles is gone as well in the mentioned titles in the issue?

[rocknrollnor]

Yes

[arvvoid]

Ok, I will tag the issue as fixed.
Now I just need someone that can, to test this on a recent build of Kodi 19 (alpha, test only on isolated test device/virtual machine) and then I can merge this and release.