Callback::reform() should return Callback<T, OUT>

[orzogc]

Description

Callback::reform() should return Callback<T, OUT> instead of Callback<T>.

Checklist

• I have reviewed my own code
• I have added tests

[github-actions]

Visit the preview URL for this PR (updated for commit f545ffd):

https://yew-rs-api--pr2719-callback-r3r2kv39.web.app

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[github-actions]

Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
boids	172.978	172.978	0	0.000%
contexts	109.753	109.753	0	0.000%
counter	86.719	86.719	0	0.000%
counter_functional	87.371	87.371	0	0.000%
dyn_create_destroy_apps	89.862	89.862	0	0.000%
file_upload	102.795	102.795	0	0.000%
function_memory_game	167.428	167.428	0	0.000%
function_router	350.024	350.024	0	0.000%
function_todomvc	162.074	162.074	0	0.000%
futures	227.084	227.084	0	0.000%
game_of_life	107.706	107.706	0	0.000%
inner_html	83.789	83.789	0	0.000%
js_callback	112.977	112.977	0	0.000%
keyed_list	195.257	195.257	0	0.000%
mount_point	86.349	86.349	0	0.000%
nested_list	116.088	116.088	0	0.000%
node_refs	90.542	90.542	0	0.000%
password_strength	1538.481	1538.481	0	0.000%
portals	97.358	97.358	0	0.000%
router	318.985	318.985	0	0.000%
simple_ssr	153.690	153.690	0	0.000%
ssr_router	395.478	395.478	0	0.000%
suspense	110.663	110.663	0	0.000%
timer	89.457	89.457	0	0.000%
todomvc	143.129	143.129	0	0.000%
two_apps	87.330	87.330	0	0.000%
web_worker_fib	153.772	153.772	0	0.000%
webgl	87.610	87.610	0	0.000%

✅ None of the examples has changed their size significantly.

[hamza1311]

Thanks for the PR! That must've been oversight on my part when changing the Callback related code

[WorldSEnder]

Lgtm. Not part of this PR, but did you feel any need for a similar method changing the OUT type of the callback by transforming it through a function?