Bump omr-agentcore and prep for release v5.0.4

Author: mattcolegate

README.md

@@ -487,9 +487,10 @@ This module adopts the [Module Long Term Support (LTS)](http://github.com/CloudN
 | V5.x.x           | May 2019     | Dec 2020    |              | Current     |
 
 ## Version
-5.0.3
+5.0.4
 
 ## Release History
+`5.0.4` - zAppmetrics fixes, and bump agentcore for Alpine support.  
 `5.0.3` - Bug fix.  
 `5.0.2` - Bump level of omragentcore.  
 `5.0.1` - Bug fix for incorrect timiings on http request.  

omr-agentcore

@@ -1,6 +1,6 @@
 {
   "name": "appmetrics",
-  "version": "5.0.3",
+  "version": "5.0.4",
   "engines": {
     "node": ">=6"
   },