message: restrict `multi_dim_translate` to gdal >=  3.1
diff: +#[cfg(all(major_ge_3, minor_ge_1))]
  mod mdimtranslate;
  mod vrt;
  +#[cfg(all(major_ge_3, minor_ge_1))]
  pub use mdimtranslate::{
  multi_dim_translate, MultiDimTranslateDestination, MultiDimTranslateOption,
  };
  