chore(deps): Bump @cosmjs/proto-signing from 0.31.0 to 0.31.1 #566

Job	Run time
Build & Test / Build Node.js	23s
Lint / Broken Markdown links	37s
Build & Test / Build Docker image	1m 16s
Lint / Super Linter	2m 10s
Release	0s
Staging	0s
	4m 26s

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