Bump @grpc/proto-loader from 0.7.12 to 0.7.13 in /http2/node-grpc

Bumps [@grpc/proto-loader](https://github.com/grpc/grpc-node) from 0.7.12 to 0.7.13.
- [Release notes](https://github.com/grpc/grpc-node/releases)
- [Commits](https://github.com/grpc/grpc-node/compare/@grpc/proto-loader@0.7.12...@grpc/proto-loader@0.7.13)

---
updated-dependencies:
- dependency-name: "@grpc/proto-loader"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

http2/node-grpc/package-lock.json

@@ -9,6 +9,6 @@
   "author": "",
   "dependencies": {
     "@grpc/grpc-js": "^1.10.6",
-    "@grpc/proto-loader": "^0.7.7"
+    "@grpc/proto-loader": "^0.7.13"
   }
 }