v21.4.0

What's Changed

• Update sdk and cli versions by @sisuresh in #300
• Add eth abi example by @leighmcculloch in #301
• Update Cargo.toml file on all contracts. by @fnando in #304
• Update custom account examples to use the SDK interface by @leighmcculloch in #303
• Remove unused DataKey by @sisuresh in #306
• Prevent contracts from being re-initialized by @matiassequeira in #307
• PR: decimal value shall not be greater than 18 by @unboxedtype in #309
• Add an example contract that demonstrates TTL testing techniques. by @dmkozh in #310
• feat: switch hello_world to String by @chadoh in #314
• change custom_types contract to be equivalent to the one in soroban-cli by @BlaineHeffron in #313
• Remove rust-analyzer-compat ci check by @leighmcculloch in #315
• Update to v21 by @leighmcculloch in #318
• Add CI concurrency group by @leighmcculloch in #319
• Update soroban-token-sdk dep to 21.4.0 by @leighmcculloch in #321

New Contributors

• @fnando made their first contribution in #304
• @matiassequeira made their first contribution in #307
• @unboxedtype made their first contribution in #309
• @BlaineHeffron made their first contribution in #313

Full Changelog: v20.2.0...v21.4.0