Release new version

[rbu]

I appreciate that #161 was merged, but unfortunately we cannot depend on it as it's not released yet. Is there a roadmap for when releases are created?

[asottile]

We tend to schedule our releases around when the upstream makes a major change (unless of course we fix some critical bug on our side). They haven't released in quite a while but it looks like they're in the somewhat-final stages of the 3.4.0 release: sass/libsass#2174

[asottile]

upstream 3.3.6 is now available as 0.11.2! ✨