Map::update does not play well with GCounter::inc

[Kiiyya]

It seems like the intended way to use the Map::update function is to use the context given in the closure, e.g. |set, c| set.add("erik", c):

rust-crdt/examples/reset_remove.rs

Lines 18 to 22 in b405f77

	friend_map_on_2nd_device.apply(friend_map_on_2nd_device.update(
	"bob",
	friend_map_on_2nd_device.len().derive_add_ctx(2),
	|set, c| set.add("erik", c),
	));

However, with GCounter instead of Orswot as the inner CRDT, this is more awkward, since the GCounter::inc function takes an actor directly, and not a context. Feels like an inconsistency. Or maybe I just missed docs somewhere, since I'm still exploring CRDTs.

My code so far, which feels wrong:

type A = &'static str;
let mut m: Map<String, GCounter<A>, A> = Map::new();
let add_ctx: AddCtx<A> = m.read_ctx().derive_add_ctx("Actor1");
m.apply(m.update(
    "Kiiya",
    add_ctx,
    |previous: &GCounter<A>, add_ctx: AddCtx<A>| {
        // return type of this closure is a `Dot<A>`.
        previous.inc(add_ctx.dot.actor) // This feels very wrong. I should be able to use the add_ctx directly here.
    }
));