chore: Bump dev version

DESCRIPTION

 Package: VISOR
 Title: Very Interoperable Spectra Objects for R
-Version: 0.0.0.9000
+Version: 0.0.0.9001
 Authors@R:
     person("Florian", "Gärber", , "florian.gaerber@uni-hamburg.de", role = c("cre", "aut"),
            comment = c(ORCID = "0000-0003-3875-9736"))

NEWS.md

-# VISOR 0.0.0.9000
+# VISOR (development version)
 
-* Added a `NEWS.md` file to track changes to the package.
+* Add `to_ChemoSpec()`, `to_hyperSpec()`
+* Add `matrix_to_ChemoSpec()`
+* Add `simplerspec_to_ChemoSpec()`