Explicitly depend on glob types

Summary:
We use them implicitly right now which causes problems
with upgrades. See https://github.com/facebook/flipper/compare/master...facebook:greenkeeper%2Fpkg-4.4.4
where a patch upgrade removes the dependency and breaks the build.

Glob is used in the new TypeScript-ified plugin building process.

Reviewed By: nikoant

Differential Revision: D20189781

fbshipit-source-id: 3b2af349f64a470e1f3e5a78d69b94d7f28e1332

package.json

@@ -146,6 +146,7 @@
     "@emotion/core": "^10.0.22",
     "@emotion/styled": "^10.0.23",
     "@iarna/toml": "^2.2.3",
+    "@types/glob": "^7.1.1",
     "@types/promise-retry": "^1.1.3",
     "@types/react-color": "^3.0.1",
     "@types/react-test-renderer": "^16.9.1",