Changes to support ES 6

README.md

composer.json

docs/Aggregation/Bucketing/Children.md

docs/Aggregation/Bucketing/DateHistogram.md

docs/Aggregation/Bucketing/DateRange.md

docs/Aggregation/Bucketing/DiversifiedSampler.md

docs/Aggregation/Bucketing/Filter.md

docs/Aggregation/Bucketing/Filters.md

docs/Aggregation/Bucketing/GeoDistance.md

docs/Aggregation/Bucketing/GeoHashGrid.md

docs/Aggregation/Bucketing/Global.md

docs/Aggregation/Bucketing/Histogram.md

docs/Aggregation/Bucketing/Ipv4Range.md

docs/Aggregation/Bucketing/Missing.md

docs/Aggregation/Bucketing/Nested.md

docs/Aggregation/Bucketing/Range.md

docs/Aggregation/Bucketing/ReverseNested.md

docs/Aggregation/Bucketing/SamplerAgg.md

docs/Aggregation/Bucketing/SignificantTerms.md

docs/Aggregation/Bucketing/Terms.md