There is an updated pull request by TinfoilSubmarine against master on the void-packages repository

https://github.com/TinfoilSubmarine/void-packages maint/synapse
https://github.com/void-linux/void-packages/pull/40446

synapse: update to 1.71.0.
also enable more tests

#### Testing the changes
- I tested the changes in this PR: **YES**

Had to bump several different dependencies. Here's where they need to be tested
as well:

python-attrs (really just need to test python-Twisted):
- [ ] python-automat
- [ ] python-service_identity

python3-attrs:
- [ ] coursera-dl
- [ ] pantalaimon
- [ ] pycp
- [ ] pysolfc
- [x] python3-Twisted
- [x] python3-aiohttp
- [ ] python3-aiohttp-sse-client
- [ ] python3-aiohttp2
- [ ] python3-aiorpcx
- [x] python3-automat
- [ ] python3-gogs-client
- [x] python3-hypothesis
- [x] python3-jsonschema
- [x] python3-matrix-common
- [ ] python3-parver
- [x] python3-pytest
- [x] python3-service_identity
- [x] python3-treq
- [ ] python3-trio
- [ ] python3-txacme
- [x] synapse
- [ ] ueberzug

python-automat:
- [ ] python-Twisted

python3-automat:
- [x] python3-Twisted
- [ ] python3-txtorcon

python3-PyHamcrest (checkdepends):
- [x] python3-Twisted
- [x] rtags

python3-Twisted:
- [ ] alot
- [ ] deluge https://github.com/void-linux/void-packages/pull/40453
- [ ] python3-TxSNI
- [ ] python3-autobahn
- [x] python3-treq
- [ ] python3-txacme
- [x] python3-txredisapi
- [ ] python3-txtorcon
- [x] synapse
- [ ] syncplay

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A patch file from https://github.com/void-linux/void-packages/pull/40446.patch is attached