node20 support

[tux93]

Currently it is not possible to build mjolnir with node20:

yarn install v1.22.19
warning ../package.json: No license field
warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
[1/5] Validating package.json...
[2/5] Resolving packages...
[3/5] Fetching packages...
error matrix-appservice@1.1.0: The engine "node" is incompatible with this module. Expected version ">=14 <=18". Got "20.8.1"
error Found incompatible module.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

This is a problem for me because openSUSE Tumbleweed dropped all node versions < 20 quite a while ago because it caused problems with openSSL 3.1

[tux93]

For now I was able to work around this by bumping the version of matrix-appservice-bridge in package.json, that way the build succeeds and mjolnir appears to be running fine.

diff --git a/package.json b/package.json
index 4b24df8..45bdf50 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "humanize-duration-ts": "^2.1.1",
     "js-yaml": "^4.1.0",
     "jsdom": "^16.6.0",
-    "matrix-appservice-bridge": "8.1.2",
+    "matrix-appservice-bridge": "9.0.1",
     "parse-duration": "^1.0.2",
     "pg": "^8.8.0",
     "prom-client": "^14.1.0",