bump fishnet min version to 2.1.3
bump fishnet min version to 2.1.3

2.1.3 is the oldest 2.x release that does not have the variant analysis bug
(https://github.com/niklasf/fishnet/issues/147).

I also wrote emails to the last remaining contributors on 1.x.

arex1337/lila,arex1337/lila,arex1337/lila,luanlv/lila,arex1337/lila,luanlv/lila,luanlv/lila,arex1337/lila,arex1337/lila,luanlv/lila,arex1337/lila,luanlv/lila,luanlv/lila,luanlv/lila