build(shortcuts): move @types/zen-observable to devDependencies

Signed-off-by: Alec Jacobs <cajacobs5401@gmail.com>

plugins/shortcuts/package.json

@@ -30,7 +30,6 @@
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.57",
-    "@types/zen-observable": "^0.8.2",
     "react-hook-form": "^7.12.2",
     "react-use": "^17.2.4",
     "uuid": "^8.3.2",
@@ -49,6 +48,7 @@
     "@testing-library/react": "^12.1.3",
     "@testing-library/user-event": "^14.0.0",
     "@types/node": "^16.11.26",
+    "@types/zen-observable": "^0.8.2",
     "cross-fetch": "^3.1.5",
     "msw": "^1.0.0"
   },