Revert "Test with unreleased versions of Ruby"
Revert "Test with unreleased versions of Ruby"

This reverts commit 69e2b5f62d543820035541db46ea50478c7a2f8a.

thirdthing/typus,readyfor/typus,readyfor/typus,chiragshah/typus,baban/typus,wollzelle/typus,readyfor/typus,burn-notice/typus,baban/typus,burn-notice/typus,typus/typus,thirdthing/typus,brainsome-de/typus,thirdthing/typus,chiragshah/typus,brainsome-de/typus,typus/typus,chiragshah/typus,brainsome-de/typus,burn-notice/typus,readyfor/typus,baban/typus,wollzelle/typus,wollzelle/typus,typus/typus,chiragshah/typus,typus/typus,thirdthing/typus,brainsome-de/typus,wollzelle/typus,burn-notice/typus,baban/typus