Update dependency mongodb to ^4.15.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mongodb	^4.14.0 -> ^4.15.0

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Release Notes

mongodb/node-mongodb-native

v4.15.0

Compare Source

The MongoDB Node.js team is pleased to announce version 4.15.0 of the mongodb package!

Features

• NODE-5054: add AssumeRoleWithWebIdentity support to 4x driver (#​3566) (8a8c386)

Bug Fixes

• NODE-5097: set timeout on write and reset on message (#​3590) (2d3576b)

Documentation

• Reference: https://docs.mongodb.com/drivers/node/current/
• API: https://mongodb.github.io/node-mongodb-native/4.15/
• Changelog: HISTORY.md

We invite you to try the mongodb library immediately, and report any issues to the NODE project.

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