Merge pull request #39 from davidcui-amzn/opendistro-1.4.0.0

OD 1.4 Release updating version

Author: davidcui1225

src/main/java/com/amazon/opendistroforelasticsearch/jdbc/internal/Version.java

@@ -19,7 +19,7 @@
 public enum Version {
 
     // keep this in sync with the gradle version
-    Current(1, 3, 0, 0);
+    Current(1, 4, 0, 0);
 
     private int major;
     private int minor;