Update dependency anywidget to v0.9.18

Author: renovate[bot]

requirements.txt

@@ -5,7 +5,7 @@ aiosignal==1.3.2
 aniso8601==10.0.0
 annotated-types==0.7.0
 anyio==4.8.0
-anywidget==0.9.15
+anywidget==0.9.18
 appdirs==1.4.4
 argon2-cffi==23.1.0
 argon2-cffi-bindings==21.2.0