Add shenv in Shells section (#276)

README.md

@@ -39,6 +39,7 @@ A curated list of awesome command-line frameworks, toolkits, guides and gizmos.
 * [bash](https://www.gnu.org/software/bash/) - GNU Project's shell (Bourne Again SHell)
 * [elvish](https://elv.sh/) - Friendly, expressive shell features like anonymous functions and data structures
 * [fish](https://fishshell.com) - Smart and user-friendly command line shell
+* [shenv](https://github.com/shenv/shenv) - Simple shell version management
 * [xiki](http://xiki.org) - Makes the shell console more friendly and powerful
 * [xonsh](https://xonsh.org) - Python-ish, BASHwards-looking shell language and command prompt
 * [zsh](http://www.zsh.org) - Powerful shell with scripting language
@@ -93,7 +94,7 @@ A curated list of awesome command-line frameworks, toolkits, guides and gizmos.
 * [q](https://github.com/cal2195/q) - Vim like macro registers for your Bash and Zsh Shell
 * [qfc](https://github.com/pindexis/qfc) - File-completion widget for Bash and Zsh
 * [rg](https://github.com/BurntSushi/ripgrep) - ripgrep is a line oriented search tool that combines the usability of The Silver Searcher with the raw speed of GNU grep
-* [shell-history](https://github.com/Pawamoy/shell-history) - Visualize your shell usage with Highcharts
+* [shell-history](https://github.com/pawamoy/shell-history) - Visualize your shell usage with Highcharts
 * [SHML](https://github.com/odb/shml) - Style framework for the terminal (Shell Markup Language)
 * [slugify](https://github.com/benlinton/slugify) - Command that converts filenames and directories to a web friendly format
 * [sman](https://github.com/tokozedg/sman) - :bug: A command-line snippet manager