fix a typo

Author: bySabi

README.md

@@ -24,12 +24,12 @@ npm install react-scrollchor --save
 
 ### Dependencies
 * User should provide its  own `React` package
-* on `Node 4` and `npm 2` package [fbjs](https://www.npmjs.com/package/fbjs) should be installed too:
-    ```bash
-    npm install fbjs --save
-    ```
+* on `npm 2` enviroments, package [fbjs](https://www.npmjs.com/package/fbjs) should be installed too:
+```bash
+npm install fbjs --save
+```
 
-#### **fbjs** package
+#### `fbjs` package
 [fbjs](https://www.npmjs.com/package/fbjs) is a collection of utility libraries created by React Team. It include useful modules like `warning` and `invariant`