v1.1.6 CRAN release

Fix & update

• New module scatterplotUI & scatterplotServer: scatterplot using ggpubr: apply to Basic statistics

• timerocModule, rocModule: Compare ROC curve even if there are different sample size(na omit)

• Change timeby unit from 1 to 0.5 (when <365)

• Add surv.scale option to kaplan-meier plot

• Fix PS matching error with missing values