Chore: Upgrades jQuery and @types/jQuery (#25651)

* Chore: upgrades jQuery and @types/jQuery

* Chore: reduce strict null errors

* Fixed issue in graphite func editor

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

packages/grafana-data/package.json

@@ -37,7 +37,7 @@
     "@rollup/plugin-node-resolve": "7.1.1",
     "@types/braintree__sanitize-url": "4.0.0",
     "@types/jest": "23.3.14",
-    "@types/jquery": "1.10.35",
+    "@types/jquery": "3.3.38",
     "@types/lodash": "4.14.123",
     "@types/node": "10.14.1",
     "@types/papaparse": "4.5.9",

packages/grafana-ui/package.json

@@ -45,7 +45,7 @@
     "d3": "5.15.0",
     "emotion": "10.0.27",
     "immutable": "3.8.2",
-    "jquery": "3.4.1",
+    "jquery": "3.5.1",
     "lodash": "4.17.15",
     "moment": "2.24.0",
     "papaparse": "4.6.3",
@@ -83,7 +83,7 @@
     "@types/common-tags": "^1.8.0",
     "@types/d3": "5.7.2",
     "@types/jest": "23.3.14",
-    "@types/jquery": "1.10.35",
+    "@types/jquery": "3.3.38",
     "@types/lodash": "4.14.123",
     "@types/node": "10.14.1",
     "@types/papaparse": "4.5.9",