@firebase/testing Produces grpc Deprecation Warning

[adamduren]

Any test I create using the @firebase/testing library litters my test output with DeprecationWarnings.

(node:10167) DeprecationWarning: grpc.load: Use the @grpc/proto-loader module with grpc.loadPackageDefinition instead

@firebase/testing: "~0.9.4"

Not sure how simple the fix is as I am unfamiliar with the library but I'm pretty sure it's this line.

firebase-js-sdk/packages/testing/src/api/index.ts

Line 35 in 9f6dbc8

const PROTOS = grpc.load(PROTO_ROOT, /* format = */ 'proto');

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[ryanpbrewster]

This was fixed by #1806