fix: More error visibility in nodejs-datastore (#1389)

* Upgrade the google-gax version

* fix: More error visibility in nodejs-datastore

Author: danieljbruce

package.json

@@ -46,7 +46,7 @@
     "async-mutex": "^0.5.0",
     "concat-stream": "^2.0.0",
     "extend": "^3.0.2",
-    "google-gax": "^5.0.1-rc.0",
+    "google-gax": "^5.0.2-rc.1",
     "is": "^3.3.0",
     "protobufjs": "7.0.0",
     "split-array-stream": "^2.0.0",