[CI] Updates to test against Elasticsearch 7.3.0

Author: estolfo

.ci/run-tests

@@ -12,7 +12,7 @@
 set -eo pipefail
 
 export RUBY_TEST_VERSION=${RUBY_TEST_VERSION:-2.6.1}
-export ELASTICSEARCH_VERSION=${ELASTICSEARCH_VERSION:-7.2.0}
+export ELASTICSEARCH_VERSION=${ELASTICSEARCH_VERSION:-7.3.0}
 export SINGLE_TEST=${SINGLE_TEST}
 
 set +x

.ci/test-matrix.yml

@@ -1,7 +1,7 @@
 ---
 ELASTICSEARCH_VERSION:
 - 7.2.0
-- 7.3.0-SNAPSHOT
+- 7.3.0
 
 RUBY_TEST_VERSION:
 - 2.6.1

.travis.yml

@@ -19,7 +19,7 @@ branches:
 env:
   global:
     - TEST_ES_SERVER=http://localhost:9250
-    - ELASTICSEARCH_VERSION=7.2.0
+    - ELASTICSEARCH_VERSION=7.3.0
 
 matrix:
   include: