Log Message:
www/xh: update to 0.18.0

Features
 - Support reading query param and header values from a file, see #288
   (@ducaale)
 - Highlight Syntax errors found while tokenizing a JSON path, see #260
   (@ducaale)
 - Support outputting the metadata of a response via --meta, --print=m or -vv,
   see #240 (@ducaale)

Bug fixes
 - Fix panic when when parsing connection timeout, see #295 (@sorairolake)

Breaking changes
 - Remove -m as a short flag for --multipart, see #299 (@ducaale)