CRAN release: 5.2.10

• feat: new cross models budget allocation functions robyn_xchannels() and robyn_xchannels() #57
• feat: formatNum() improvements to be more flexible with abbr = TRUE on very different scales of numbers
• feat: new is_odd(), is_even() and seq_surnames() functions
• fix: better error in connection handling for holidays()
• fix: add some missing try_require("h2o")

Full Changelog: v5.2.9...v5.2.10