Upgraded packages.

Author: Tonye Jack

package-lock.json

@@ -36,13 +36,14 @@
     "@apollo/react-common": "^3.1.3",
     "apollo-client": "^2.6.8",
     "apollo-cache": "^1.3.4",
-    "react-dom": "^16.12.0"
+    "react-dom": "^16.12.0",
+    "mem": "^4.3.0"
   },
   "dependencies": {
     "path": "^0.12.7",
     "process": "^0.11.10",
     "shelljs": "^0.8.3",
-    "yargs": "^14.0.0",
+    "yargs": "^15.0.2",
     "minimatch": "^3.0.4"
   }
 }