[Snyk] Security upgrade @cosmjs/stargate from 0.28.4 to 0.28.6#15

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celestia-bot wants to merge 1 commit intomasterfrom snyk-fix-fe21bf97dcb90f973f7b7fdba8b4589f

+98-40

Commits on Oct 23, 2023

fix: package.json & yarn.lock to reduce vulnerabilities
snyk-bot
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