chore(barretenberg): Release 0.2.0

[github-actions]

🤖 I have created a release beep boop

0.2.0 (2023-07-11)

⚠ BREAKING CHANGES

• Use circuit builders (#501)

Features

• Add get_sibling_path method in MerkleTree (#584) (b3db9f8)
• dsl: Add ECDSA secp256r1 verification (#582) (adc4c7b)
• Initial native version of bb binary. (#524) (4a1b532)
• Make the circuit constructors field agnostic so we can check circuits on grumpkin (#534) (656d794)
• Multithreaded Sumcheck (#556) (c4094b1)
• Optimize memory consumption of pedersen generators (#413) (d60b16a)
• Parallelised folding in Gemini (#550) (3b962d3)
• Sort includes (#571) (dfa8736)
• Split plonk and honk tests (#529) (ba583ff)

Bug Fixes

• add NUM_RESERVED_GATES before fetching subgroup size in composer (#539) (fa11abf)
• Adds VERSION file to release-please (#542) (31fb34c)
• Avoid bb.js memory issues. (#578) (96891de)
• BarycentricData instantiation time and unused code in secp curves (#572) (bc78bb0)
• Build on stock apple clang. (#592) (0ac4bc3)
• bump timeout on common test. (c9bc87d)
• check_circuit bug fix (#510) (4b156a3)
• cleanup of include statements and dependencies (#527) (b288c24)
• Ecdsa Malleability Bug (#512) (5cf856c)
• ecdsa: correct short weierstrass curve eqn (#567) (386ec63)
• Increment CMakeList version on releases (#536) (b571411)
• Revert "fix: add NUM_RESERVED_GATES before fetching subgroup size in composer" (#540) (a9fbc39)
• Soundness issue in bigfield's evaluate_multiply_add method (#558) (1a98ac6)
• Update versioning in nix files when a release is made (#549) (1b3ff93)

Code Refactoring

• Use circuit builders (#501) (709a29c)

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This PR was generated with Release Please. See documentation.

[kevaundray]

This now updates the version in project() in CMakeLists.txt -- @dbanks12 there seems to be a VERSION file in the root of the project, should this be updated too on releases? Its currently at version 3.0 so perhaps its refering to the version of something else

[kevaundray]

The version bumping on releases has now been added to the VERSION file -- @phated I'm guessing we need it for barretenberg.nix too here?

EDIT: This has been added in #549

[github-actions]

🤖 Release is at https://github.com/AztecProtocol/barretenberg/releases/tag/v0.2.0 🌻