• Fix #846 choosing GET and POST in endpoints based on body [acbc76d0]
• Fix #843 adding wait_for_active_shards and pipeline in UpdateByQuery [acbc76d0]
• Fixed missing ScriptsPainlessExecute endpoint, since ES 6.3 [acbc76d0]
• Fixed missing RankEval endpoint, since ES 6.2 [acbc76d0]
• Added User-Agent header equal to elasticsearch-php/6.7.2 (metadata-values) [acbc76d0]