Update changelog for version 0.3.0

NEWS.md

@@ -8,7 +8,9 @@
     - optionally replace missing `filterdepth` values in a conservative way, based on `tubelength` (argument `filterdepth_guess`, #44)
     - return eight more observation well attributes beside `filterdepth` (#44)
     - four methods are available to aggregate observation well attributes per location (argument `obswell_aggr`, #44)
-- `convertdf_enc()` is now reexported from `inborutils`
+    - applying a spatial mask is now a little speedier (#57)
+- `as_points()` and `get_locs()` return a warning when duplicated coordinates occur in their local result (#51, thanks @w-jan)
+- Package dependency moved from [inborutils](https://inbo.github.io/inborutils) to [inbodb](https://inbo.github.io/inbodb): this is a change within `connect_watina()` which should not affect its behaviour and which reduces overall package dependencies.
 
 Further, a number of smaller fixes and enhancements were made.