terrainr 0.7.1

• Improvements and bug fixes:
  • Redocumented package to stay on CRAN.
  • merge_rasters no longer warns that options aren't respected when using
    the fallback method before immediately passing said options to gdalwarp.
  • Starting to move error messages into rlang with string interpolation
    via glue.
• Dependency changes:
  • rlang and glue have been added to Imports
  • raster now requires a minimum version of 3.5-19.