cloned! macro doesn't use absolute paths

[arctic-hen7]

It seems that the cloned! macro doesn't use the absolute path to itself, meaning that it can't be used in another macro as ::sycamore::prelude::cloned!.

sycamore/packages/sycamore-reactive/src/lib.rs

Lines 148 to 158 in 56e8f04

	macro_rules! cloned {
	(($($arg:ident),*) => $e:expr) => {{
	// clone all the args
	$( let $arg = ::std::clone::Clone::clone(&$arg); )*
	$e
	}};
	($($arg:ident),* => $e:expr) => {
	cloned!(($($arg),*) => $e)
	};
	}

I'm happy to try a fix for this, but I'm not sure if you'd want to use an absolute path that goes through sycamore_reactive or sycamore::prelude... (Perhaps cloned! should be redeclared in the Sycamore package?)

[lukechu10]

I'm pretty sure we can use $crate here since it's a MBE. You're welcome to send a PR if you want and I can cut a new minor release for 0.7 merged. Do note that I'm on the verge of merging #337 which will remove any use for this macro.

[arctic-hen7]

I don't need this urgently, I've just worked around by useing it in a new block, and if #337 will make this entirely obsolete (hooray!) then this is fine to be closed I think!