Use crssuggest for `geo_buffer()` and `geo_projected()` type functions

[Robinlovelace]

I'm impressed with this, may thanks @walkerke!

crsuggest::suggest_crs(stplanr::cents_sf)
# A tibble: 10 × 6
   crs_code crs_name                          crs_type  crs_gcs crs_units crs_proj4
   <chr>    <chr>                             <chr>       <dbl> <chr>     <chr>    
 1 27700    OSGB36 / British National Grid    projected    4277 m         +proj=tm…
 2 5643     ED50 / SPBA LCC                   projected    4230 m         +proj=lc…

[walkerke]

@Robinlovelace thank you! let me know if any issues arise when using it as a dependency.