thought-machine/please v16.15.0

Please v16.15.0

on GitHub

This is Please v16.15.0

• Added plz query reporoot command #2173
• Fixed issue where named fields (e.g. srcs, and outputs) didn't appear
  in plz query print #2174
• Add the subrepo name to labels in plz query graph #2168
• Add --json flag to plz query print to output the target in json format
  #2176
• cc_static_library() now exposes headers to dependant targets #2179