Make Bug Fix Release

[CSSFrancis]

Based on #499 we should make a quick bug release to release a new version of diffsims downstream.

@hakonanes Any thoughts on this?

[argerlt]

@CSSFrancis , is this still an issue?

[hakonanes]

Well, yes, but I don't think it's urgent. And I'm not sure the fix in #499 is the correct one. Let's leave this for later.