Re-use serde variant names in `Event::name` method #673

Job	Run time
Build docs	33s
Check minimal versions	42s
Examples	3m 40s
Test (macOS)	3m 50s
MSRV	0s
Test (nightly)	5m 14s
Test (stable)	5m 50s
Test (beta)	4m 49s
Test (Windows)	6m 10s
Test (native-tls)	4m 15s
Test (no default features)	1m 7s
Test (no cache)	5m 46s
Test (no gateway)	3m 18s
Test (unstable Discord API features)	1m 40s
Test (simd-json)	5m 49s
Test (chrono, chrono)	1m 1s
Test (builder without model, builder, true)	36s
Test (unstable Discord API (no default features), unstable_discord_api, true)	32s
	54m 52s

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