add support for edit_current_application endpoint #5750

Job	Run time
Test (macOS)	1m 11s
Test (stable)	2m 28s
Build docs	44s
Test (beta)	2m 10s
Examples	2m 18s
Check minimal versions	28s
Test (Windows)	4m 11s
Test (native-tls)	2m 9s
MSRV	0s
Test (nightly)	1m 31s
Test (no default features)	42s
Test (no cache)	2m 25s
Test (no gateway)	1m 38s
Test (unstable Discord API features)	2m 27s
Test (chrono, chrono)	42s
Test (unstable API + typesize, default unstable typesize, true)	51s
Test (builder without model, builder, true)	20s
Test (unstable Discord API (no default features), unstable, true)	19s
	26m 34s

Provide feedback