Position and color scales for bench_expr data

Description

Default scales for the bench_expr class, these are added to plots using bench_expr objects automatically.

Usage

scale_x_bench_expr(...)

scale_y_bench_expr(...)

scale_colour_bench_expr(palette = scales::hue_pal(...), ...,
  aesthetics = "colour")

scale_color_bench_expr(palette = scales::hue_pal(...), ...,
  aesthetics = "colour")