update version tool add missing package

Summary:
Adding missing package `invariant` to package.json which is used in scripts updateVersion

Changelog: [Internal]

Reviewed By: robhogan

Differential Revision: D39498178

fbshipit-source-id: ee795118d1887baddef8cbb7b14975731385d0fe

Author: jacdebug

package.json

@@ -27,6 +27,7 @@
     "flow-bin": "^0.186.0",
     "glob": "^7.1.1",
     "hermes-eslint": "0.8.0",
+    "invariant": "^2.2.4",
     "istanbul-api": "3.0.0",
     "istanbul-lib-coverage": "3.0.0",
     "jest": "^26.6.3",