Update Unicode-Collate to CPAN version 0.92

Update Unicode-Collate to CPAN version 0.92

  [DELTA]

  0.92  Wed Nov 14 20:58:19 2012
    - fix: index() etc. with preprocess/normalization should be always croaked.
    - doc: referred to the latest UTS #10 and updated its section numbers.
    - supported the identical level (see 'identical' in POD).
    - Now UCA_Version 26 (for Unicode 6.2.0) is supported.
    - added ident.t in t.
    - modified tests: cjkrange.t, compatui.t, hangtype.t, index.t,
      overcjk0.t, overcjk1.t, test.t, view.t in t.

    * But the default UCA_Version is still 24.
     (In the next release, UCA_Version 26 will be the default.)