Bump struct-patch from 0.4.1 to 0.8.6

[yanganto]

update for latest syntax

[extrawurst]

this does not affect the serialization format i assume? otherwise we need a breaking change note and adapt docs

[yanganto]

You are correct. The serialization format does not change.

The crate now supports all kind of attributes on patch, Option<NestingStruct> fields, and more operators (+, and <<) on patch in the later versions.

Gitui uses a simple not nesting struct for the config, and does not manipulate on multiple patches, so the only change is the macro syntax.