#21458: Elasticsearch 6.x support

 - Updated package dependencis versions

Author: ishakhsuvarov

app/code/Magento/Elasticsearch6/composer.json

@@ -8,8 +8,8 @@
         "magento/module-catalog-search": "*",
         "magento/module-search": "*",
         "magento/module-store": "*",
-        "magento/module-elasticsearch": ">=100.3.0",
-        "elasticsearch/elasticsearch": "~2.0|~5.1|~6.1"
+        "magento/module-elasticsearch": "*",
+        "elasticsearch/elasticsearch": "~6.1"
     },
     "suggest": {
         "magento/module-config": "*"

dev/tests/static/testsuite/Magento/Test/Php/_files/phpcpd/blacklist/common.txt

@@ -208,4 +208,4 @@ Magento/InventoryGroupedProductIndexer/Indexer
 Magento/Customer/Model/FileUploaderDataResolver.php
 Magento/Customer/Model/Customer/DataProvider.php
 Magento/InventoryShippingAdminUi/Ui/DataProvider
-Magento/Elasticsearch/Model/Client/Elasticsearch.php
+Magento/Elasticsearch6/Model/Client/Elasticsearch.php