Allow patchlevel and minor updates to winston-mongodb

[sergiitk]

What's this PR do?

Allows patch and minor updates to winston-mongodb, see https://docs.npmjs.com/misc/semver#caret-ranges-123-025-004

How should this be reviewed?

npm install

Any background context you want to provide?

May have caused recent crashes on Gambit prod with the following stacktrace:

MongoError: index not found with name [timestamp_1]
at Function.MongoError.create (/app/node_modules/mongodb-core/lib/error.js:31:11)
at /app/node_modules/mongodb-core/lib/connection/pool.js:483:72
at authenticateStragglers (/app/node_modules/mongodb-core/lib/connection/pool.js:429:16)
at Connection.messageHandler (/app/node_modules/mongodb-core/lib/connection/pool.js:463:5)
at Socket.<anonymous> (/app/node_modules/mongodb-core/lib/connection/connection.js:309:22)
at emitOne (events.js:96:13)
at Socket.emit (events.js:191:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at TCP.onread (net.js:563:20)

The problem is described in winstonjs/winston-mongodb#75 and fixed in winston-mongodb@2.0.1. As of today, the most recent version is winston-mongodb@2.0.8.

cc @rapala61

[sergiitk]

A part of #774

[sergiitk]

This was an attempt to fix #811