chore: Update NEWS.md and bump version

DESCRIPTION

 Type: Package
 Package: VISOR
 Title: Very Interoperable Spectra Objects for R
-Version: 0.0.0.9001
+Version: 0.0.0.9002
 Authors@R:
     person("Florian", "Gärber", , "florian.gaerber@uni-hamburg.de", role = c("cre", "aut"),
            comment = c(ORCID = "0000-0003-3875-9736"))

NEWS.md

@@ -9,3 +9,12 @@
 * Add opusreader2 source for hyperSpec: `opusreader2_to_hyperSpec()`
   * Add opusreader2 source for ChemoSpec via hyperSpec: `opusreader2_to_ChemoSpec()`
   * Add support functions `.getDataBlockNames()` and `.getParamBlockNames()`.
+
+## Changes
+
+* Fix call to `hyperSpec::new_hyperSpec` (was renamed to `hyperSpec::hyperSpec` in https://github.com/r-hyperspec/hyperSpec/commit/65c2c2d562769cf998d1ead950538089d3bf52d5).
+* `to_ChemoSpec`-family of functions:
+  * `groups` is no longer a required parameter.
+  * `groups` now also accepts a single string or integer value, 
+    which is then treated as the group for every sample.
+  * `groups` now defaults to `"{missing group}`.