Fixes #202. Test expectations are updated. For example, BUFFER='/bin' is now highlighted as path_prefix because it's a prefix of '/bin/sh' which would be valid. However, BUFFER='/bin;' is now properly highlighted as an error (unless AUTO_CD is set).
zsh-syntax-highlighting / highlighters
Navigate into the individual highlighters' documentation to see
what styles ($ZSH_HIGHLIGHT_STYLES keys) each highlighter defines.
Refer to the documentation on highlighters for further information.