Fix grammar mistake

README.md

@@ -104,7 +104,7 @@ export default class Demo extends React.Component {
 Property name | Description
 ------------ | -------------
 **component** | String. The component that will wrap all the children. Default: `div`.
-**chindrenStyles** | Object. This object has the properties: `base`, `appear`, `enter` and `leave`. Each of this properties is another object containing the styles for the respective phase. The `base` styles are applied to all children in all phases.
+**chindrenStyles** | Object. This object has the properties: `base`, `appear`, `enter` and `leave`. Each of these properties is another object containing the styles for the respective phase. The `base` styles are applied to all children in all phases.
 **onPhaseStart** | Function. Callback that will be called with the current phase (`appear`, `enter` or `leave`) and the child `id` when the phase begins in this order.
 **onPhaseEnd** | Function. Callback that will be called with the current phase (`appear`, `enter` or `leave`) and the child `id` when the phase ends in this order.