Log Message:
p5-Search-Elasticsearch: update to 6.00.

6.00    2017-11-14
        Released 6.00 with default API for 6_0.
        Legacy 5_0 API now released separately
        Trace logging now includes content-type headers where appropriate
        Deprecation warnings are now parsed to extract the message only
        Improved boolean value handling in query string params - now accepts
          true, false, \1, \0, or a JSON::PP::Boolean object
        Handle removal of '.' from @INC in perl 5.26