[elpa] externals/xr updated (dcf5240 -> 7842512)

[Mattias Engdeg�rd]

mattiase pushed a change to branch externals/xr.

      from  dcf5240   Increment version to 1.16
       new  45108ee   Expand strings to characters in subset computation
       new  376fd03   Reduce consing in hot paths
       new  7842512   Increment version to 1.17


Summary of changes:
 xr-test.el | 12 ++++++++++++
 xr.el      | 63 +++++++++++++++++++++++++++++++-------------------------------
 2 files changed, 43 insertions(+), 32 deletions(-)