CI: Use ruby 2.4.9, 2.5.7, 2.6.5#18

Open

olleolleolle wants to merge 3 commits intowinebarrel:masterfrom

olleolleolle:patch-2

Commits on Aug 31, 2019

CI: Use 2.5.6, 2.6.4
olleolleolle
authored

Commits on Sep 3, 2019

CI: use 2.4.7
olleolleolle
authored

Commits on Oct 2, 2019

CI: Use 2.4.9, 2.5.7, 2.6.5
olleolleolle
authored