Update readme for Color, Bold, Underline (#71)

Author: George Karagkiaouris

readme.md

@@ -537,18 +537,32 @@ const Demo = (
 );
 ```
 
-The `<Text>` compoment is a simple wrapper around [the `chalk` API](https://github.com/chalk/chalk#api) it supports all of the chalk methods as `props`.
+The `<Color>` compoment is a simple wrapper around [the `chalk` API](https://github.com/chalk/chalk#api) it supports all of the chalk methods as `props`.
 
 ```jsx
-import {Text} from "ink"
+import {Color} from 'ink';
 
-<Text rgb={[255, 255, 255]} bgKeyword="magenta">
+<Color rgb={[255, 255, 255]} bgKeyword="magenta">
 	Hello!
-</Text>
+</Color>
 
-<Text hex="#000000" bgHex="#FFFFFF">
+<Color hex="#000000" bgHex="#FFFFFF">
 	Hey there
-</Text>
+</Color>
+```
+
+The `<Bold>` and `<Underline>` components render their children bolded and underlined respectively.
+
+```jsx
+import {Bold, Underline} from 'ink';
+
+<Bold>
+	I am bold
+</Bold>
+
+<Underline>
+	I am underlined
+</Underline>
 ```
 
 ## License