Fixing CDS-UI Build issues

Issue-ID: CCSDK-3744
Signed-off-by: Singal, Kapil (ks220y) <ks220y@att.com>
Change-Id: I8cd8a11c8ada5a1179b4a791edc12dd810f7f1bf
(cherry picked from commit 9eb67111794a2a10bc9776775aced9ef9b84345b)
diff --git a/cds-ui/designer-client/package-lock.json b/cds-ui/designer-client/package-lock.json
index 540f2e9..6993133 100644
--- a/cds-ui/designer-client/package-lock.json
+++ b/cds-ui/designer-client/package-lock.json
@@ -2690,7 +2690,7 @@
             "lodash": "^4.17.15",
             "mute-stream": "0.0.8",
             "run-async": "^2.4.0",
-            "rxjs": "^6.5.3",
+            "rxjs": "6.5.4",
             "string-width": "^4.1.0",
             "strip-ansi": "^6.0.0",
             "through": "^2.3.6"