update news.md (#287)

NEWS.md

@@ -1,3 +1,11 @@
+# DataFramesMeta v0.9.0 Release notes
+
+* `@passmissing` flag for skipping missing values in row-wise macros. ([#272](https://github.com/JuliaData/DataFramesMeta.jl/pull/272))
+* Add`$` to escape columns rather than `cols`, which is now deprecated. ([#285](https://github.com/JuliaData/DataFramesMeta.jl/pull/285))
+* Fix a bug disallowing multiple arguments in function-like syntax for row-wise macros. ([#281](https://github.com/JuliaData/DataFramesMeta.jl/pull/281))
+* Documentation improvements ([#277](https://github.com/JuliaData/DataFramesMeta.jl/pull/277), [#279](https://github.com/JuliaData/DataFramesMeta.jl/pull/279), [#284](https://github.com/JuliaData/DataFramesMeta.jl/pull/284), [#286](https://github.com/JuliaData/DataFramesMeta.jl/pull/286))
+* Add a new dplyr-inspired tutorial ([#279](https://github.com/JuliaData/DataFramesMeta.jl/pull/279))
+
 # DataFramesMeta v0.6 Release Notes
 
 * The order of rows after a `@transform(gd::GroupedDataFrame, args...)` now matches the