chore: bump 3.9.4 (#892)

Author: ohager

openapi/signum-api.json

@@ -2,7 +2,7 @@
   "openapi": "3.0.3",
   "info": {
     "title": "Signum Node API",
-    "version": "3.9.3",
+    "version": "3.9.4",
     "description": "This is the API documentation of the Signum Node"
   },
   "paths": {

src/brs/Signum.java

@@ -76,7 +76,7 @@
  */
 public final class Signum {
 
-    public static final Version VERSION = Version.parse("v3.9.3");
+    public static final Version VERSION = Version.parse("v3.9.4");
     public static final String APPLICATION = "BRS";
 
     public static final String CONF_FOLDER = "./conf";