chore(typos): Clean up typos in README and index.ts

Author: NickTomlin

README.md

@@ -11,7 +11,7 @@ You can view the full list of commands in [`lib/index.ts`](lib/index.ts#L8).
 Usage
 -----
 
-If you are using a versoin of `selenium-webdriver` below `3.0.0-beta-1`, you
+If you are using a version of `selenium-webdriver` below `3.0.0-beta-1`, you
 must use the `patch()` function before you create your webdriver instance:
 
 ```js

lib/index.ts

@@ -157,7 +157,7 @@ export function extend(baseDriver: WebDriver, fallbackGracefully = false): Exten
 }
 
 /**
- * Patches webdriver so that the extender can defie new commands.
+ * Patches webdriver so that the extender can define new commands.
  *
  * @example
  * patch(require('selenium-webdriver/lib/command'),