security: bump jquery version to 3.4.0

package.json

@@ -185,7 +185,7 @@
     "eventemitter3": "^2.0.3",
     "file-saver": "^1.3.3",
     "immutable": "^3.8.2",
-    "jquery": "^3.2.1",
+    "jquery": "3.4.0",
     "lodash": "^4.17.10",
     "moment": "^2.22.2",
     "mousetrap": "^1.6.0",

packages/grafana-ui/package.json

@@ -22,7 +22,7 @@
     "@types/react-color": "^2.14.0",
     "classnames": "^2.2.5",
     "d3": "^5.7.0",
-    "jquery": "^3.2.1",
+    "jquery": "3.4.0",
     "lodash": "^4.17.10",
     "moment": "^2.22.2",
     "papaparse": "^4.6.3",