Please add to this.

• mut semantics rework
• lib: support sol dynamically-sized abi encode/decode #1203
• const/immutable contract fields #1204
• Array lowering #1186
• test and fix yul codegen name conflicts #1195
• fe build #1157
• workspaces #1194
• fe new or fe init command #1206
• support trait-based for loop iteration #1207
• packed storage
• std lib: high-level calldata decode function
• std lib: recv "fallback" type
• dispatch tree (instead of linear)
• nicer way to specify sol-compatible selector (eg #[selector = sol("transfer(address,uint256)")])