refactor(experimental): delete Buffer in non-Node tests

[steveluscher]

Summary

This makes the browser environment closer to an actual browser, because browsers have no access to Buffer.

[steveluscher]

Current dependencies on/for this PR:

• master
  • PR refactor(experimental): delete Buffer in non-Node tests #1860 👈
    • PR refactor(experimental): create a sham for PublicKey #1861
      • PR refactor(experimental): add constants to web3.js sham #1862
        • PR refactor(experimental): create a sham for Keypair #1863
          • PR refactor(experimental): export every type from the sham #1864

This stack of pull requests is managed by Graphite.

[lorisleiva]

This is causing some browser tests to fail on the RPC transport package. We should probably update them as part of this PR.

[steveluscher]

This is causing some browser tests to fail on the RPC transport package. We should probably update them as part of this PR.

Uggggggggg jest-fetch-mock is pulling in node-fetch whyyyyyy.

[steveluscher]

Giving up on this for now. #1867

[github-actions]

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