Merge pull request #54 from afsc-gap-products/dev

Update NEWS for 3.3-1

NEWS

@@ -1,12 +1,15 @@
-coldpool 3.3-1 (November 13, 2023)
+coldpool 3.3-1 (February 23, 2023)
 ----------------------------------------------------------------
 
-NEW FEATURE
+NEW FEATURES
 
 - Added kriging_cv() function to compare kriging methods 
   using cross-validation for ordinary kriging,co-kriging, and 
   regression kriging.
 - Added estimate_z_expansion() function to estimate the vertical
   expansion factors for 3D kriging based on cross-validation.
 - Added estimate_anisotropy() function for estimating 2D
-  anisotropy in variograms using cross-validation.
+  anisotropy in variograms using cross-validation.
+- Added new file naming conventions and masking options to
+  interpolate_variable(), which should deprecate data2raster()
+  in a future release.