stellar-rpc-client: Add support for new simulateTransaction stateChan… #209

Job	Run time
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	2m 28s
Integration tests (ubuntu-20.04, 1.22)	11m 11s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	2m 43s
Integration tests (ubuntu-22.04, 1.22)	10m 57s
Build (macos-latest, x86_64-apple-darwin, amd64)	4m 20s
Unit tests (ubuntu-20.04, 1.22)	2m 0s
Build (macos-latest, aarch64-apple-darwin, arm64)	3m 47s
Unit tests (ubuntu-22.04, 1.22)	1m 57s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	7m 48s
	47m 11s

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