Update quasi* to 0.3.11 to fix latest nightly build
Update quasi* to 0.3.11 to fix latest nightly build

Quasi 0.3.10 is broken on the latest nightly because of
https://github.com/rust-lang/rust/pull/30460, 0.3.11 fixes the issues
and builds successfully.

@mcasper and @mikeastock

tohou/diesel,diesel-rs/diesel,diesel-rs/diesel,mcasper/diesel,cascalheira/diesel,sgrif/diesel,SoftwareWarlock/diesel,SoftwareWarlock/diesel,tohou/diesel,mcasper/diesel,cascalheira/diesel,sgrif/diesel