Bump version to 8.4.0

Author: Anaethelion

.ci/test-matrix.yml

@@ -1,7 +1,7 @@
 ---
 
 STACK_VERSION:
-  - 8.3.0-SNAPSHOT
+  - 8.4.0-SNAPSHOT
 
 GO_VERSION:
   - 1-alpine

Makefile

@@ -1,6 +1,6 @@
 SHELL := /bin/bash
 
-ELASTICSEARCH_DEFAULT_BUILD_VERSION = "8.3.0-SNAPSHOT"
+ELASTICSEARCH_DEFAULT_BUILD_VERSION = "8.4.0-SNAPSHOT"
 
 ##@ Test
 test-unit:  ## Run unit tests

internal/version/version.go

@@ -19,4 +19,4 @@ package version
 
 // Client returns the client version as a string.
 //
-const Client = "8.3.0-SNAPSHOT"
+const Client = "8.4.0-SNAPSHOT"