Update dependency express-winston to v3

[ot-renovate]

This PR contains the following updates:

Package	Type	Update	Change
express-winston	dependencies	major	2.6.0 → 3.4.0

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Release Notes

bithavoc/express-winston (express-winston)

v3.4.0

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• Added: Nested Whitelists (#​225, @​kapalex)

v3.3.0

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• Added: options.headerBlacklist (#​217, @​maxday)

v3.2.1

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• Added: options.skip (#​214, #​147, @​ahnkee)

v3.2.0

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• Replaced: _header -> getHeader (#​210, @​Gregoirevda)
• Replaced coverage tool blanket with nyc (#​211, @​golopot)
• Add eslint and fix lint errors (#​212, @​golopot)

v3.1.0

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• Fix large _.template memory consumption (#​203, @​slickmb)

v3.0.1

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• Add format to options to allow user-specified formatting following winston@​3 conventions (#​190, @​crellison)

v3.0.0

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express-winston@​3 shouldn't have any breaking changes of its own, but there are breaking changes as a result of upgrading winston and Node.js.

express-winston@​2.6.0 will be the last version to support winston@​2.

Breaking changes

• Drop support for winston < 3. winston@​3 includes quite a few breaking changes. Check their changelog and upgrade guide to get an idea of winston's breaking changes.
• Drop support for Node.js < 6. v6 is the oldest version of Node.js currently supported by the Node.js team.

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