• Updates baseline to upstream SQLite 3.42.0
• Does not allow key to be set again on a connection after it has been successfully used for an encryption or decryption operation to prevent accidental database corruption
• Raises an error if a rekey operation is attempted on an unencrypted database
• Raises an error when a key or rekey operation is passed an empty key
• Minor improvements to constant time functions
• Miscellaneous code and comment cleanup