refactor: remove mime-types / mime-db dependency

[ddelgrosso1]

Currently we utilize mime to detect content types and set metadata accordingly. Mime uses mime-db which is essentially a lookup table from JSON files. This dependency is accounting for ~13% of our package size. We should remove this dependency in favor of something smaller for example we could write a MIME sniffer based on the spec if one does not already exist for Node.

[ddelgrosso1]

Circling back as I noticed we are using two libraries that essentially do the same thing.

nodejs-storage/package.json

Line 86 in 36d2721

"mime": "^3.0.0",

and

nodejs-storage/package.json

Line 87 in 36d2721

"mime-types": "^2.0.8",

At the very least we should remove one (probably mime-types as it is the one requiring mime-db) and just use mime. I'm not sure if this would be a breaking change as it would difficult to test every mime type permutation.

[ddelgrosso1]

After more investigation I don't believe the removal of mime-types to be breaking. All of the additional types supported by mime-db appear to be extension-less which means they would be of no use in setting the content type based on a file extension.