Add agext/levenshtein to 'Data Structures'

README.md

@@ -228,6 +228,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 * [goskiplist](https://github.com/ryszard/goskiplist) - A skip list implementation in Go.
 * [gota](https://github.com/kniren/gota) - An implementation of dataframes, series, and data wrangling methods for Go.
 * [hilbert](https://github.com/google/hilbert) - Go package for mapping values to and from space-filling curves, such as Hilbert and Peano curves.
+* [levenshtein](https://github.com/agext/levenshtein) - Levenshtein distance and similarity metrics with customizable edit costs and Winkler-like bonus for common prefix.
 * [levenshtein](https://github.com/agnivade/levenshtein) - Implementation to calculate levenshtein distance in Go.
 * [mafsa](https://github.com/smartystreets/mafsa) - MA-FSA implementation with Minimal Perfect Hashing
 * [roaring](https://github.com/RoaringBitmap/roaring) - Go package implementing compressed bitsets.
@@ -1286,7 +1287,7 @@ Go software and plugins.
 ## Editor Plugins
 
 * [go-lang-idea-plugin](https://github.com/go-lang-plugin-org/go-lang-idea-plugin) Go plugin for IntelliJ IDEA.
-* [go-mode](https://github.com/dominikh/go-mode.el) - Go mode for GNU/Emacs. 
+* [go-mode](https://github.com/dominikh/go-mode.el) - Go mode for GNU/Emacs.
 * [go-plus](https://github.com/joefitzgerald/go-plus) - Go (Golang) Package For Atom That Adds Autocomplete, Formatting, Syntax Checking, Linting and Vetting
 * [Goclipse](https://github.com/GoClipse/goclipse) - An Eclipse plugin for Go.
 * [gocode](https://github.com/nsf/gocode) - An autocompletion daemon for the Go programming language.