• Added /* autoprefixer: ignore next warning */ (by @dualfroz).
• Fixed losing unprefixed selectors in old browsers in grouping (by @ybai08).
• Fixed selector duplicates on multiple Autoprefixer runs.
• Fixed case-insensitive pseudo-selector prefixing (by @jakezwang).
• Fixed -webkit-cross-fade() for images with numbers (by @mkantautas).
• Fixed source maps for Grid prefixes (by @dualfroz).