aggs for properties of document

src/ElasticSearch/Config/product.mappings.php

...asticSearch/Converter/Request/Aggregation/Aggregation.php

...rch/Converter/Request/Aggregation/PropertyAggregation.php

...lasticSearch/Converter/Request/CriteriaRequestBuilder.php

src/ElasticSearch/Converter/Result/EsResponseToResult.php

src/ElasticSearch/Criteria/Aggs/Aggs.php

src/ElasticSearch/Criteria/Aggs/AggsCollection.php

src/ElasticSearch/Criteria/Criteria.php

src/ElasticSearch/Criteria/Filter/Value/FilterKeyword.php

src/ElasticSearch/SearchService.php

tests/Filter/AggsPropsTest.php

tests/Filter/IndexesTest.php

tests/Filter/QueryTest.php

tests/Helpers/TestIndexProvider.php

tests/Seed/DefaultSeed.php