RenovateBot: Update dependency mat2 to v0.13.4

This MR contains the following updates:

Package	Update	Change
mat2	patch	==0.13.3 -> ==0.13.4

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Release Notes

jvoisin/mat2 (mat2)

v0.13.4

Compare Source

• Add documentation about mat2 on OSX
• Make use of python3.7 constructs to simplify code
• Use moderner type annotations
• Harden get_meta in archive.py against variants of CVE-2022-35410
• Improve MSOffice document support
• Package the manpage on pypi

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