v0.1.8

• Retained the compatibility with xarray 0.15 by removing the attrs flag.
• Added xarray_geomask function and made it a public function.
• More efficient handling of large geotiff responses by cropping the response before converting it into a dataset.
• Added a new function called geo2polygon for converting and transforming a polygon or bounding box into a Shapley's Polygon in the target CRS.
• This release will be a part of Hydrodata 0.7.0.