No support for non-integer explanatory variables? about finalfit HOT 3 CLOSED

dat<-data.frame(
 y=rnorm(10),
 x1=gl(2,5, labels=c("A","B")),
 x2=(1:10)/10
)

dat %>% 
 finalfit('y', c('x1','x2'))
Dependent is not a factor and will be treated as a continuous variable
  Dependent: y         Mean (sd)     Coefficient (univariable)    Coefficient (multivariable)
1           x1       A 0.1 (1.0)                             -                              -
2                    B 0.1 (0.7) 0.01 (-1.20 to 1.21, p=0.991) -1.10 (-3.54 to 1.33, p=0.319)
3           x2 [0.1,1] 0.1 (0.8) 0.55 (-1.51 to 2.60, p=0.556)  2.22 (-2.02 to 6.46, p=0.255)