use openwhisk-client-js 3.21.8 (#248)

diff --git a/core/nodejsActionBase/package.json b/core/nodejsActionBase/package.json
index a112e70..14dc1f6 100644
--- a/core/nodejsActionBase/package.json
+++ b/core/nodejsActionBase/package.json
@@ -18,7 +18,7 @@
     "request": "2.88.2"
   },
   "dependencies": {
-    "openwhisk": "3.21.7",
+    "openwhisk": "3.21.8",
     "express": "4.17.3",
     "serialize-error": "9.1.0",
     "redis": "4.0.4",