chore(deps): bump canvas from 2.7.0 to 2.8.0

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Bumps canvas from 2.7.0 to 2.8.0.

Changelog

Sourced from canvas's changelog.

2.8.0

Changed

• Upgrade dtslint
• Upgrade node-pre-gyp to 1.0.0. Note that if you are using special node-pre-gyp features like node_pre_gyp_accessKeyId, you may need to make changes to your installation procedure. See https://github.com/mapbox/node-pre-gyp/blob/master/CHANGELOG.md#100.
• Add Node.js v16 to CI.
• The C++ class method nBytes() now returns a size_t. (Because this is a C++ method only, this is not considered a breaking change.)
• Export type NodeCanvasRenderingContext2D so you can pass the current context to functions (TypeScript).

Added

• Add support for inverse() and invertSelf() to DOMMatrix (#1648)
• Add support for context.getTransform() (#1769)
• Add support for context.setTransform(dommatrix) (#1769)

Fixed

• Fix actualBoundingBoxLeft and actualBoundingBoxRight returned by measureText to be the ink rect (#1776, fixes #1703).
• Fix Pango logging "expect ugly output" on Windows (#1643)
• Fix benchmark for createPNGStream (#1672)
• Fix dangling reference in BackendOperationNotAvailable exception (#1740)
• Fix always-false comparison warning in Canvas.cc.
• Fix Node.js crash when throwing from an onload or onerror handler.

Commits

• 8707f3d v2.8.0
• 5b5140e Add Node.js 16 to CI, remove 15
• 2bf76b5 export type NodeCanvasRenderingContext2D
• 0b49442 Update changelog to reflect previous commit
• c166443 Add ctx2d.setTransform(mat) overload
• 2f84eee Add ctx2d.getTransform() function
• d107c04 Update changelog to reflect previous commit
• 234e659 Fix text actualBoundingBoxLeft and actualBoundingBoxRight measures by using i...
• e4f901c Loosen text measurement expectation.
• 12e671d Fix crash if exception thrown from onload/onerror
• Additional commits viewable in compare view

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