v6.4.0

Fixed

• Allow empty passwords in AWS_VAULT_FILE_PASSPHRASE #773
• Fix ykman prompt for v4. #741 0fa49bd db08b16
• Improve error messages when rotating 0c92ff7
• Eagerly fetch credentials when the ECS server starts to prevent timeouts #804
• Update MFA prompt message, fixes #799

Added

• Add --force flag to aws-vault rm to remove a profile without a confirmation prompt #731
• Make "file" backend directory configurable #814
• Add an example Dockerfile 4de0ce9

Changed

• Update AWS SDK to v2 #769
• Security hardening #791 #792
• Removed android release build #846