Bump ed25519-dalek from 2.0.0 to 2.1.1 #2790

Job	Run time
Clippy	1m 4s
Deny (advisories)	23s
Deny (bans licenses sources)	23s
Format	10s
Check (stable)	56s
Hack	1m 48s
Check (1.70.0)	1m 12s
Tests	3m 51s
Cross (aarch64-linux-android)	2m 32s
Documentation	56s
Cross (aarch64-unknown-linux-gnu)	2m 35s
Cross (aarch64-unknown-linux-musl)	2m 30s
Lint markdown files	56s
Tools	2m 23s
	21m 39s

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