fix(schema): Check for undefined value in resolveQueryObjectId resolver

[philipimperato]

Summary

Insures that a undefined or null field within the mongodb objectId resolver (resolveQueryObjectId) doesn't throw an exception and returns undefined.

[netlify[bot]]

‼️ Deploy request for feathers-dove rejected.

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🔨 Latest commit	5127272e0c0befc18d42087549abd4f291653bf8

[daffl]

Great, thank you! Will go out shortly.