Upated readme to include DEBUG_TIMESTAMPS details

Author: rynmsh

README.md

@@ -149,6 +149,7 @@ change the behavior of the debug logging:
 | `DEBUG_COLORS`| Whether or not to use colors in the debug output. |
 | `DEBUG_DEPTH` | Object inspection depth. |
 | `DEBUG_SHOW_HIDDEN` | Shows hidden properties on inspected objects. |
+| `DEBUG_TIMESTAMPS` | Turns off timestamps when DEBUG_COLORS is false. |
 
 
 __Note:__ The environment variables beginning with `DEBUG_` end up being