Bump sharp from 0.21.3 to 0.22.1

[dependabot-preview]

Bumps sharp from 0.21.3 to 0.22.1.

Changelog

Sourced from sharp's changelog.

v0.22.1 - 25^th April 2019

• Add modulate operation for brightness, saturation and hue.
  #1601
  @​Goues

• Improve help messaging should require("sharp") fail.
  #1638
  @​sidharthachatterjee

• Add support for Node 12.
  #1668

v0.22.0 - 18^th March 2019

• Remove functions previously deprecated in v0.21.0:
  background, crop, embed, ignoreAspectRatio, max, min and withoutEnlargement.

• Add composite operation supporting multiple images and blend modes; deprecate overlayWith.
  #728

• Add support for pages input option for multi-page input.
  #1566

• Allow Stream-based input of raw pixel data.
  #1579

• Add support for page input option to GIF and PDF.
  #1595
  @​ramiel

v0.21 - "teeth"

Requires libvips v8.7.0.

Commits

• 05d76ee Release v0.22.1
• 28a6c53 Prevent issue templates being published to npm
• 6fcd215 Docs: add support for Node 12 #1668
• 7ae0512 Docs: clarify some output features require custom libvips
• 0890b59 Add Node 12 to Windows CI (#1669)
• df3ce45 Bump all dependencies
• bb0257b Remove not-yet-available Node 12 from Windows CI
• 9c35976 Add Node 12 to CI
• aa9b328 Remove use of deprecated V8 API, swap v8::Handle for v8::Local #1668
• 159e8da docs: Fix path to CONTRIBUTING.md (#1666)
• Additional commits viewable in compare view

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