build(deps): update dependency node-fetch to ^2.6.12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
node-fetch	^2.6.11 -> ^2.6.12

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Release Notes

node-fetch/node-fetch (node-fetch)

### [`v2.6.12`](https://togithub.com/node-fetch/node-fetch/releases/tag/v2.6.12) [Compare Source](https://togithub.com/node-fetch/node-fetch/compare/v2.6.11...v2.6.12) ##### Bug Fixes - socket variable testing for undefined ([#​1726](https://togithub.com/bitinn/node-fetch/issues/1726)) ([8bc3a7c](https://togithub.com/bitinn/node-fetch/commit/8bc3a7c85f67fb81bb3d71c8254e68f3b88e9169))

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Configuration

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