Fix vulnerabilities in npm packages (#4490)

package.json

@@ -37,14 +37,14 @@
     "curl-amd": "~0.8.12",
     "docdown": "~0.7.2",
     "dojo": "^1.12.1",
-    "ecstatic": "^2.1.0",
+    "ecstatic": "^2.2.2",
     "eslint": "^6.2.0",
     "eslint-plugin-import": "^2.18.2",
     "esm": "^3.1.3",
     "fs-extra": "~1.0.0",
     "glob": "^7.1.1",
     "istanbul": "0.4.5",
-    "jquery": "^3.1.1",
+    "jquery": "^3.4.1",
     "lodash": "4.17.11",
     "lodash-doc-globals": "^0.1.1",
     "markdown-doctest": "^0.9.1",