Updates readme

Author: arqex

README.md

@@ -50,7 +50,7 @@ We can pass some options in order to retrieve the wanted instance from the DOM n
 
 ### Options
 
-* **componentName**
+* **`componentName`**
 
 Sometimes there are more than one component instance linked to a DOM node. For example, when a component `render` method returns another component, or when using higher order components.
 
@@ -75,7 +75,7 @@ findInstance( domNode, {componentName: 'ParentComponent'} );
 findInstance( domNode ); // ChildComponent instance
 ```
 
-* **maxIteration**
+* **`maxIteration`**
 
 When there are more than one component linked to the same DOM node, `findInstance` navigates recursively through the react fibers looking for the instance of the right component we want. To make this process fast and avoid infinite loops there is a maximum number of iterations that the algorithm does until it decides that the instance can't be found. By default `findInstance` iterates `4` times looking for the instance and return `false` after not finding it.