added NEWS.md

NEWS.md

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+# wilson 2.0.0 
+## Features
+- clarion class:
+  - easier data-format validation by providing several checks
+  - simplified module usage (only forward clarion object) for top-level modules (e.g. filter & plot)
+  - provide functions for frequent tasks (e.g. get_name, is_delimited, etc.)
+
+- geneView: 
+  - group columns by one or more factors
+
+- pca:
+  - color & shape grouping by selected factor(s)
+
+- scatterPlot:
+  - add name to hovertext if available (only interactive)
+
+## Misc
+- improved notifications (closable, more)
+- overall code quality improvements via usage of packages goodpractice and lintr
+- removed deprecated colorPicker
+
+# wilson 1.0.0
+first public release