deps: bump @types/node-fetch from 2.5.4 to 2.5.5

Bumps [@types/node-fetch](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node-fetch) from 2.5.4 to 2.5.5.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node-fetch)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -60,7 +60,7 @@
   "devDependencies": {
     "@types/jest": "^25.1.3",
     "@types/node": "~12",
-    "@types/node-fetch": "^2.5.4",
+    "@types/node-fetch": "^2.5.5",
     "@typescript-eslint/eslint-plugin": "^2.21.0",
     "@typescript-eslint/parser": "^2.21.0",
     "@zeit/ncc": "^0.21.0",