Hardhat v2.12.3

• Added a new hardhat_metadata RPC method
• Trim leading and trailing spaces in mnemonics (thanks @winor30!)
• Pending blocks now include the bloom field (thanks @InoMurko!)
• A better error is shown if a Solidity file makes an import through its own package name (thanks @KaanKC!)
• Added a getBuildInfoSync function to the hre.artifacts object (thanks @emretepedev!)
• Fixed an edge case where Hardhat would hang if debug_traceTransaction was used with an OOG transaction sent to a precompile