fix(ci): resolve CI issues, npm audit fix, simplify dep management

[bkrem]

Context

• The package-level lockfiles are redundant as the root level one is the authoritative lockfile, and we do not bundle lockfiles into our vendored packages, i.e. they're not consumed by projects installing these packages.
• Upgrades the node version to v20, which resolves an environment resolution error for global.crypto, see: crypto is not defined when running on Node.js nextauthjs/next-auth#9814 (comment)
• Fixes an issue where a broken projectId was inlined into the jsonrpc-ws and jsonrpc-provider tests, causing 403
• Runs npm audit fix (i.e. all non-breaking fixes); this should auto close some existing renovatebot/dependabot PRs.

[bkrem]

Provider test is still failing bc it relies on cloudflare-eth.com for the HTTP provider test and is being rate limited rn from me doing a lot of CI runs. Will rerun but passed locally for me.

Worked ✅

[Cali93]

LGTM, curious why not node 22 ?

[bkrem]

LGTM, curious why not node 22 ?

The ws implementation in node 22 seems to return different errors: https://github.com/WalletConnect/walletconnect-utils/actions/runs/12594957689/job/35103326396

I think we can upgrade to it easily for our tests but I don't want to touch actual source code or change test assertions in this PR.