Changelog for integer-gmp-1.0.3.0

Changelog for integer-gmp package

1.0.3.0 January 2019

1.0.2.0 April 2018

1.0.1.0 July 2017

1.0.0.1 Feb 2016

1.0.0.0 Mar 2015

0.5.1.0 Feb 2014