Release 1.2.3

• Dropped support for Leiningen in favor of deps.edn
• Dropped support for environ (handled by aliases)
• Switched from helpshift/hydrox to the maintained parkside-securities/hydrox
• Switched from Travis to CircleCI
• Moved documentation to the domain randomseed.io
• Renamed group artifact ID to randomseed.io
• Fixed type hints for primitive types
• Fixed metadata of macros