reactivity: derived signals should be allowed as getters

[otonashixav]

Describe the bug
I note that the reactivity docs mention:

This rule ignores object and class methods completely. Solid is based on functions/closures only, and it's uncommon to see methods in Solid code.

However, with getters this is not the case. The docs suggest using getters as derived values in stores: https://www.solidjs.com/docs/latest/api#getters.

Expected behavior
Getter should not warn.

Screenshots

Additional context
Discord

[joshwilsonvu]

This is fixed in v0.4.7, thanks for the report!