Bump hardhat from 2.19.1 to 2.21.0

[dependabot[bot]]

Bumps hardhat from 2.19.1 to 2.21.0.

Release notes

Sourced from hardhat's releases.

Hardhat v2.21.0 — Introducing EDR

This version of Hardhat marks the debut of EDR (Ethereum Development Runtime), our new Rust-based runtime that is a complete rewrite of the original TypeScript-based Hardhat Network. This release lays a new long-term foundation for Hardhat's evolution over the coming year.

There are no functional changes, but there are some performance improvements across the board, which we’ll continue to expand in future updates.

Given the significance of this internal change, there’s a possibility of bugs. If you encounter any problems specific to this version, please report them by opening an issue. You should be able to downgrade to v2.20.1 without losing functionality if needed.

solidity-coverage out-of-memory issues

The solidity-coverage plugin works by heavily instrumenting the code, which sometimes causes OOM (out-of-memory) issues. This new version of Hardhat can, in certain cases, make those problems more likely.

If you run into this, you can fix it by using Node.js’s --max-old-space-size flag:

NODE_OPTIONS="--max-old-space-size=8192" npx hardhat coverage

Dropping support for Node.js v16

As part of this release, we are dropping support for Node.js v16. This version of Node.js reached its end-of-life in September of last year. You can learn more about our support guarantees here.

Hardhat v2.20.1

This release fixes a bug when hardhat_setStorageAt was used in untouched addresses.

Hardhat v2.20.0 — Cancun

This release adds support for the upcoming cancun hardfork. This hardfork is not enabled by default; if you want to use it, then you have to enable it in your Hardhat config:

module.exports = {
  networks: {
    hardhat: {
      hardfork: "cancun",
    },
  },
}

Keep in mind that blob transactions are not supported yet. If you need this, please upvote or comment on this issue.

In addition, this release adds support for solc 0.8.24.

Hardhat v2.19.5

This release includes the following changes:

• Notify users when a new Hardhat version is available
• Fixed a bug during project initialization when using yarn or pnpm
• Fixed a race condition that occurred when multiple Hardhat processes ran a compilation at the same time
• Added a fix to prevent submitting transactions with 0 priority fee (thanks @​itsdevbear!)

Hardhat v2.19.4

This release changes our telemetry to anonymously report the consent response.

... (truncated)

Commits

• 2b0563b Version Packages
• 9b0f366 edr-0.2.0
• 88b8741 Merge pull request #4902 from NomicFoundation/post-release-cleanup
• 8a45de9 Merge pull request #4949 from NomicFoundation/edr/fix-provider-error-object
• 5abd444 Use Options's .copied instead of .cloned
• 88c4597 Merge branch 'main' into edr/fix-provider-error-object
• 379d31a Merge pull request #4954 from NomicFoundation/edr/fix-oom
• a5f0a7e Don't run async event handlers if there are no listeners
• e59d054 Make sendRawTx test work on forks
• e4247f0 Put data and transactionHash as top-level error fields
• Additional commits viewable in compare view

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