Use safe unwrapping in option unwrap #266

Job	Run time
build (stellar-cli, stellar, ubuntu-20.04, x86_64-unknown-linux-gnu)	13m 18s
build (stellar-cli, stellar, ubuntu-20.04, aarch64-unknown-linux-gnu)	14m 51s
build (stellar-cli, stellar, macos-14, x86_64-apple-darwin)	9m 11s
build (stellar-cli, stellar, macos-12, aarch64-apple-darwin)	14m 35s
build (stellar-cli, stellar, windows-latest, x86_64-pc-windows-msvc, .exe)	20m 27s
build (soroban-cli, soroban, ubuntu-20.04, x86_64-unknown-linux-gnu)	14m 7s
build (soroban-cli, soroban, ubuntu-20.04, aarch64-unknown-linux-gnu)	15m 58s
build (soroban-cli, soroban, macos-14, x86_64-apple-darwin)	10m 31s
build (soroban-cli, soroban, macos-12, aarch64-apple-darwin)	15m 55s
build (soroban-cli, soroban, windows-latest, x86_64-pc-windows-msvc, .exe)	20m 58s
	2h 29m 51s

Provide feedback