[elpa] externals/xr updated (e77aa97 -> 139ed84)

[Mattias Engdegård]

mattiase pushed a change to branch externals/xr.

      from  e77aa97   Postfix ops are literal after ^ but not after \(?:^\)
       new  74cc24c   Simplify: use preceding-char instead of buffer-substring
       new  2cfd98f   Add xr-lint, a regexp linting tool
       new  139ed84   Increment version number to 1.2


Summary of changes:
 xr-test.el |  21 ++++++++++++
 xr.el      | 109 ++++++++++++++++++++++++++++++++++++++++++-------------------
 2 files changed, 96 insertions(+), 34 deletions(-)