Fixed typo README.md (#344)

Author: rohitbishnoi

README.md

@@ -710,7 +710,7 @@ You may supply a number of options when you start to listen to the changes feed:
 | includeDocs | Whether to include document bodies or not | false | e.g. true |
 | wait | For `get`/`start` mode, automatically pause the changes reader after each request. When the the user calls `resume()`, the changes reader will resume.  | false | e.g. true |
 | fastChanges | Adds a seq_interval parameter to fetch changes more quickly | false           | true                             |   |
-| selector | Filters the changes feed with the supplied Mango selector | {"name":"fred}           | null                             |   |
+| selector | Filters the changes feed with the supplied Mango selector |    null       | {"name":"fred}                            |   |
 | timeout | The number of milliseconds a changes feed request waits for data| 60000         | 10000    |
 
 The events it emits are as follows:s