CRAN release: 5.2.11

• feat: new "certainty" and "cluster_sd" metrics for robyn_modelselector() with spend_wt lazy boolean param
• feat: new scale argument for normalize() to customize minimum and maximum (instead of default 0, 1 range)
• feat: new non_promo param for robyn_performance() to include non-promotional contributions
• fix: adapt robyn_performance() to Robyn 3.12.0 update

Full Changelog: v5.2.10...v5.2.11