Update version (#111)

Author: martinateruzzi

grape/meta.py

@@ -22,7 +22,7 @@ def get_current_year():
 __author__ = "Aurora Maurizio, Martina Teruzzi, Nicola Demo"
 __copyright__ = "Copyright 2019-{}, GRAPE contributors".format(get_current_year())
 __license__ = "MIT"
-__version__ = "1.2.0"
+__version__ = "1.3.0"
 __mail__ = 'auroramaurizio1@gmail.com, teruzzi.martina@gmail.com, demo.nicola@gmail.com'
 __maintainer__ = __author__
 __status__ = "Alpha"