Update installation instructions to include peer dependencies (#133)

* Update installation instructions to include peer dependencies

`@ensdomains/thorin` requires peer dependencies `styled-components` and `react-transition-state` but these are not listed in the initial install instructions

* update readme with peer deps

* Specify version of peer dep

Some animations don't work with react-transition-state v2

---------

Co-authored-by: Greg Skriloff <35093316+gskril@users.noreply.github.com>

README.md

@@ -9,14 +9,14 @@ A design system for ENS built with React and styled-components.
 To install this package using npm:
 
 ```bash
-npm install @ensdomains/thorin
+npm install @ensdomains/thorin styled-components react-transition-state@1.1.5
 
 ```
 
 To install this package using yarn:
 
 ```bash
-yarn add @ensdomains/thorin
+yarn add @ensdomains/thorin styled-components react-transition-state@1.1.5
 ```
 
 Checkout the project's [playroom](https://thorin.ens.domains/playroom) to preview the components in a live online environment.

docs/src/pages/index.mdx

@@ -14,7 +14,7 @@ import { Header, Link } from '~/components'
 ## Install
 
 ```bash
-yarn add @ensdomains/thorin
+yarn add @ensdomains/thorin styled-components react-transition-state@1.1.5
 ```
 
 ## Set Up