Fixes an invalid painless script.

Merge pull request #359 from scireum/aha/score-fixx

Uses the proper value when executing a field value script.

dev-18.15

Merge pull request #358 from scireum/aha/boilerplate-function-score

Improves the FunctionScoreBuilder and named query generation for Elastic.

dev-18.14

Aggregation fixes + kernel bump.

Improves handling of after_keys used by composite aggregations.

Merge pull request #356 from scireum/aha/coumpound-after-keys

Adds support for transferring after keys as compound strings.

dev-18.12.2

Merge pull request #355 from scireum/aha/bucket-aggregation-fix

Restores support for aggregation results which are returned as map.

Fixes a index out of bounds bug and provides a helper to detect if aggregations ran at all.

Merge pull request #354 from scireum/aha/empty-query-fix

Bug fixes for aggregation handling on ES queries

Query forceFail and Bucket Improvements

Merge pull request #353 from scireum/aha/cardinality-fix

Permits to specify a precision for the cardinality aggregation.

dev-18.11

Bumps sirius-kernel dev-19.3 -> dev-19.4

Improves handling of aggregation results.

Merge pull request #349 from scireum/aha/aggregations-cleanup

Removes duplicate code and simpifies accessing aggregation results.

Permits to rewrite filters in an ElasticQuery.

Merge pull request #348 from scireum/aha/filter-transformer

Permits to rewrite the filter section of a query.