Add `CREATE_EVENTS` and `CREATE_GUILD_EXPRESSIONS` permissions #725

Job	Run time
Build docs	22s
Examples	3m 7s
Check minimal versions	38s
Test (macOS)	4m 38s
Test (nightly)	2m 31s
MSRV	0s
Test (stable)	3m 6s
Test (beta)	2m 45s
Test (Windows)	4m 32s
Test (native-tls)	2m 49s
Test (no default features)	39s
Test (no cache)	2m 48s
Test (no gateway)	1m 59s
Test (unstable Discord API features)	1m 11s
Test (simd-json)	3m 11s
Test (chrono, chrono)	47s
Test (builder without model, builder, true)	23s
Test (unstable Discord API (no default features), unstable_discord_api, true)	26s
	35m 52s

Provide feedback