fix: 'os.tmpDir is not a function' on recent Node versions

[kevireilly]

Brief Summary of Changes

• Using Node version 16.16.0 and likely lower major Node versions, there is an os module breaking change where os.tmpDir() is now os.tmpdir() when running on macOS 10.15.1.
• This appears to be resolved and/or handled by a more recent version of the connect-multiparty module.
• Upgrading it reveals a small incompatibility where req.files.image.ws.bytesWritten is no longer available, so, a potential guess solution has been applied by using req.files.image.size instead.
• Error observed when uploading a photo via the Add photo button on the photo-album sample:

TypeError: os.tmpDir is not a function
    at new Form (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/multiparty/index.js:55:44)
    at multipart (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/connect-multiparty/index.js:56:16)
    at Layer.handle [as handle_request] (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/route.js:144:13)
    at Route.dispatch (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/route.js:114:3)
    at Layer.handle [as handle_request] (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/layer.js:95:5)
    at /Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/index.js:284:15
    at Function.process_params (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/index.js:346:12)
    at next (/Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/node_modules/express/lib/router/index.js:280:10)
    at /Users/kevinreilly/Development/cloudinary_npm/samples/photo_album/server.js:53:7

What Does This PR Address?

• [ ] GitHub issue (Add reference - #XX)
• [ ] Refactoring
• [ ] New feature
• [x] Bug fix
• [ ] Adds more tests

Are Tests Included?

• [ ] Yes
• [x] No

Reviewer, Please Note:

Decision to replace req.files.image.ws.bytesWritten with req.files.image.size may not be correct as the former no longer appears to be available with an upgraded version of connect-multiparty, though I'm not certain this meets the original expectations of evaluating the bytesWritten.