Add config to disable Jest warnings

[thernstig]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

We have been using Mongoose + Jest + Jest fake timers for a very long time without any problem. If you know what you are doing, this is entirely possible.

Yet we get all warnings printed from https://github.com/Automattic/mongoose/blob/master/lib/helpers/printJestWarning.js e.g.:

(node:1393585) [MONGOOSE] Warning: Mongoose: looks like you're trying to test a Mongoose app with Jest's mock timers enabled. Please make sure you read Mongoose's docs on configuring Jest to test Node.js apps: https://mongoosejs.com/docs/jest.html

It would be very nice to be able to disable this message. It is quite intrusive in the many printouts happening when you have a lot of unit test files.

Motivation

Allow users who know what they are doing to disable Jest warnings.

Example

No response

[vkarpov15]

Reasonable enough. Are you on Mongoose 6.x or 7.x?

[thernstig]

We are using 6.x, but I am fine if you do this only in 7.x and we can focus on upgrading instead. Thank you for the great project!