Update to latest release and cleanup

This commit updates Elasticsearch stack to 7.9.0. Furthermore, we update
the tests to use Go 1.14.x and 1.15.x. We also added deprecation notice
to the Flush Synced API.

Author: olivere

.github/workflows/codeql-v7.yml

@@ -14,7 +14,7 @@ jobs:
   codeql:
     strategy:
       matrix:
-        go-version: [1.13.x, 1.14.x]
+        go-version: [1.14.x, 1.15.x]
         os: [ubuntu-latest]
     name: Run ${{ matrix.go-version }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}

.github/workflows/test-v7.yml

@@ -10,7 +10,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.13.x, 1.14.x]
+        go-version: [1.14.x, 1.15.x]
         os: [ubuntu-latest]
     name: Run ${{ matrix.go-version }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}

Makefile

@@ -0,0 +1,3 @@
+.PHONY: test
+test:
+	go test -race -deprecations -strict-decoder -v . ./aws/... ./config/... ./trace/... ./uritemplates/...

docker-compose.yml

@@ -2,7 +2,7 @@ version: '3'
 
 services:
   elasticsearch:
-    image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.8.0
+    image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.9.0
     hostname: elasticsearch
     environment:
       - cluster.name=elasticsearch
@@ -28,13 +28,12 @@ services:
     ports:
       - 9200:9200
   platinum:
-    image: docker.elastic.co/elasticsearch/elasticsearch:7.8.0
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.9.0
     hostname: elasticsearch-platinum
     environment:
       - cluster.name=platinum
       - bootstrap.memory_lock=true
       - discovery.type=single-node
-      - xpack.ilm.enabled=true
       - xpack.license.self_generated.type=trial
       - xpack.security.enabled=true
       - xpack.watcher.enabled=true

indices_flush_synced.go

@@ -159,6 +159,9 @@ func (s *IndicesSyncedFlushService) Validate() error {
 }
 
 // Do executes the service.
+//
+// Deprecated: Synced flush is deprecated and will be removed in 8.0.
+// Use flush at _/flush or /{index}/_flush instead.
 func (s *IndicesSyncedFlushService) Do(ctx context.Context) (*IndicesSyncedFlushResponse, error) {
 	// Check pre-conditions
 	if err := s.Validate(); err != nil {