README update

Author: nickmaccarthy

README.md

@@ -151,6 +151,7 @@ from datemath import dm
 ```
 
 # Release Notes
+* v1.4.7 - Fixed timezone for date strings: https://github.com/nickmaccarthy/python-datemath/issues/6     
 * v1.4.5 - Added roundDown functionality.  Allows user to specify the default rounding for expressions such as `/d`.
     * example - assuming the time is currently 2016-01-01 12:00:00, we should get the following
 ```
@@ -159,7 +160,7 @@ from datemath import dm
 <Arrow [2016-01-01T23:59:00+00:00]>
 >>> dm('now/d')
 <Arrow [2016-01-01T00:00:00+00:00]>
-```        
+```   
 * v1.4.4 - Fixed bug with expression logic and rounding:  https://github.com/nickmaccarthy/python-datemath/pull/2
 * v1.4.3 - Floats are now supported for days, hours, and seconds units.  Example ```now-2.5d```, ```now-3.2h```. Any other unit other than days, hours, or seconds that is a float will be converted to an int and floored due to the datetime() module not being able to handle them.