Version 0.2.9-beta-release

Updates introduced since 0.2.8-beta-release

• 5434ab0 Bump copyright date to 2021 - (NI) 4AC3E3D5FDD208F7 U
• 28922ca Upgrade backend dependencies - (NI) 4AC3E3D5FDD208F7 U
• 0e63be7 Upgrade frontend dependencies - (NI) 4AC3E3D5FDD208F7 U
• c6683b1 Change the authentication workflow. This will allow Sshwifty to run on a multi-node autobalanced cluster. After deploy this version, users might have to reload the frontend page before continue using Sshwifty. - (NI) 4AC3E3D5FDD208F7 U