Log Message:
Update p5-biblatex-biber to 2.7

2.7    (2016-12-08)
       * New option (--nouri-encode) to prevent URL encoding of URLs. Avoids
         breaking display of URLS which contain non-ASCII.
       * Misc bug fixes
2.6    (2016-09-10)
       * Improved tool mode bibtex output. This has some normalisation
         consequences for YEAR and custom fields. See PDF doc.
       * Support for new \ifuniquebaretitle test
       * Sourcemaps can now be restricted to particular refsections
       * Perl 5.24 is now required due to use of postfix deref notation
       * Removed RIS input driver due to lack of use
       * Added extended name format - see documentation
       * Added notfield function to sourcemaps - see documentation
2.5    (2016-05-10)
       * Added data annotations feature - see biblatex documentation.
       * Removed the "latinkeys.txt" Unicode::Collate table. This is now
         pointless because the compiled 'allkeys.txt' is faster and complete.
       * Incompatible biblatex/biber version is now a fatal error.
       * Significant performance improvements, particularly in sorting
         subsystem.
       * Addition of new bblXML output format and associated RelaxNG XML
         schema based on active datamodel.
       * Integration with new biblatex 3.4 labelprefix name change and
         refcontext option.
       * Integration with new biblatex 3.4 \DeclareDatafieldSet
         functionality.
       * Improved sourcemap looping functionality