What's Changed
* Adapt to Starknet / cairo-lang 0.12.1a0 by FabijanC in https://github.com/0xSpaceShard/starknet-devnet/pull/516
* Defaulting to Cairo compiler [v2.1.0-rc0](https://github.com/starkware-libs/cairo/releases/tag/v2.1.0-rc0) when recompiling in your declare v2 transactions.
* This is a **breaking** pre-release:
* This Python implementation of Devnet will soon be replaced by a [Rust one](https://github.com/0xSpaceShard/starknet-devnet-rs)
* The official testnet is introducing a change to the status of failed transactions: distinguishing between failed validation (`REJECTED` tx) and failed execution (`REVERTED` tx). A simplification of this is introduced in this version Devnet:
* All failures are labeled as `REVERTED` (change), but not included in blocks (same as it was).
* Read more on this [documentation page](https://github.com/0xSpaceShard/starknet-devnet/blob/v0.6.0a0/page/docs/intro.md#%EF%B8%8F-disclaimer-%EF%B8%8F) or on the official [documentation site](https://0xspaceshard.github.io/starknet-devnet/docs/intro#%EF%B8%8F-disclaimer-%EF%B8%8F)
**Full Changelog**: https://github.com/0xSpaceShard/starknet-devnet/compare/v0.5.5...v0.6.0a0