feat(ts-bindings): upgrade stellar-sdk to 12.2.0

[chadoh]

What

Upgrade the version of stellar-sdk-js used by TS Bindings-generated libraries

Why

This is the latest version

Known limitations

[TODO or N/A]

[socket-security]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/@stellar/[email protected]	Transitive: environment, filesystem, network	+25	45.8 MB	stellar-npm-ci

🚮 Removed packages: npm/@stellar/[email protected], npm/@stellar/[email protected], npm/@types/[email protected], npm/[email protected]

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[Shaptic]

There was a make command that modified a bunch of generated files in the past; I see a smaller diff than I used do, so I'm just making sure that's not a thing anymore. Otherwise LGTM! 👍

[leighmcculloch]

@chadoh Is this good to merge?

[chadoh]

Re-ran make build-snapshot to make sure and one other file ended up in the checked-in build-artifact folder. It's ready now!

[fnando]

@chadoh this needs to be rebased, due to #1155 being merged.