Release notes

• Only 2.6
• Only 2.5
• Only 2.4
• Only 2.3
• Only 2.2
• Only 2.1
• Only 2.0
• Only 1.22
• Only 1.21
• Only 1.20.0
• Only 1.19.0
• Only 1.18.0
• Only 1.17.0
• Only 1.16.0