update hvega entry

Author: ocramz

_posts/2016-10-19-current-environment.md

@@ -15,7 +15,7 @@ Note: some libraries are mentioned more than once, because they provide function
 - **plotlyhs** [](https://github.com/diffusionkinetics/open/tree/master/plotlyhs){:.github} [![Hackage](https://img.shields.io/hackage/v/plotlyhs.svg)](https://hackage.haskell.org/package/plotlyhs)  [![plotlyhs](http://stackage.org/package/plotlyhs/badge/nightly)](http://stackage.org/nightly/package/plotlyhs) :  This is a library for generating JSON value to use with the Plotly.js library. The interface directly reflects the structure of the Plotly.js library and is therefore quite low-level. Lenses are used throughout to set Maybe fields in records to provide both data and configuration options.
 This library does not attempt to communicate with the Plotly API in any other way. All generated plots can be hosted on stand-alone web pages.
 - **plots**  [](https://github.com/cchalmers/plots){:.github}  [![Hackage](https://img.shields.io/hackage/v/plots.svg)](https://hackage.haskell.org/package/plots)  [![plots](http://stackage.org/package/plots/badge/nightly)](http://stackage.org/nightly/package/plots): `Diagrams`-based plotting library.
-- **hvega** [![Hackage](https://img.shields.io/hackage/v/hvega.svg)](https://hackage.haskell.org/package/hvega)  [![hvega](http://stackage.org/package/hvega/badge/nightly)](http://stackage.org/nightly/package/hvega): Support the creation of [Vega-Lite](https://vega.github.io/vega-lite/) visualizations in Haskell. 
+- **hvega** [![Hackage](https://img.shields.io/hackage/v/hvega.svg)](https://hackage.haskell.org/package/hvega)  [![hvega](http://stackage.org/package/hvega/badge/nightly)](http://stackage.org/nightly/package/hvega): Create [Vega-Lite](https://vega.github.io/vega-lite/) visualizations in Haskell, targeting version 3 of the vega-lite specification. This library follows closely the naming conventions of vega-lite, and offers an extensive [tutorial](https://hackage.haskell.org/package/hvega-0.4.1.2/docs/Graphics-Vega-Tutorials-VegaLite.html).
 
 ## Publication