@keyframes not prefixed in progress bar

Created by: glebm

In progress-bars.less:9 @keyframes are not prefixed. Vendor prefixes are deprecated (vendor-prefixes.less:3) in 3.2.0. Is Bootstrap meant to work without autoprefixer in 3.2.0?

@keyframes prefixes were removed in https://github.com/twbs/bootstrap/commit/cb7eb674accd24b6b73f26ef23cf4a301b6ebfaf.

See also: Progress bar not animating bootstrap-sass#616.