Version 0.21.0

💥 Breaking Changes

• Remove unused address parameter from cloudkms.Client#SignerForKey method (#196) @sideninja

🛠 Improvements

• Update to Cadence v0.18 (#197) @turbolent
• Validate account key weight (#199) @sideninja
• Add ExecutionReceiptSignatures and ResultApprovalSignatures to BlockSeal (#170) @beaugunderson

🏠 Housekeeping

• Update security disclosure to direct to docs.onflow.org (#203) @jkan2
• Fix examples to work with the new emulator version (#200) @janezpodhostnik