Update epoch

2020.1/aims-desktop/aims-desktop-2020/debian/changelog

+aims-desktop (1:2020.40) buster; urgency=medium
+
+  * Bump epoch so that we can upgrade from stretch
+
+ -- Jonathan Carter <jcc@debian.org>  Thu, 13 Jun 2019 10:06:34 +0000
+
 aims-desktop (2020.39) buster; urgency=medium
 
   * Reduce R packages to -base-dev, -recommended, and -cran-ggplot2