Update to 1.869
    
    - New upstream release 1.869
      - Disabled unicode testing for MCE::Shared::Cache on Perl 5.10.1; testing
        for keys containing unicode is failing on RedHat 6.x but passing in
        meta::cpan (smoke tests)
      - Share array and hash deeply: only when using the TIE interface; this
        resolves an edge case for the OO interface and passing nested items during
        construction
      - Bumped MCE dependency to 1.868