v20.15.0

Feature

• Warn about unsupported JSON schema by @RobinTail in #2116

Chores

• Better express mock by @RobinTail in #2103
• Moving SSL certificate self-signing function by @RobinTail in #2104
• Improving readability of the system test by @RobinTail in #2105
• Upgrading all dependencies by @RobinTail in #2112
• Add missing contributors by @RobinTail in #2114
• dependabot in #2108, #2109, #2110, #2111

Full Changelog: v20.14.3...v20.15.0