build(deps): update canvas to 2.8.0

[markov00]

I've updated canvas dependency to 2.8.0 to fix a missing function Automattic/node-canvas#1769 and I've removed jest-canvas-mock because canvas already mocks everything we need.

@monfera I've also tried the failing changes in https://github.com/elastic/elastic-charts/pull/1309/files replacing the clearCanvas method with:

export function clearCanvas(ctx: CanvasRenderingContext2D) {
  const { a, d } = ctx.getTransform().invertSelf().scale(ctx.canvas.width, ctx.canvas.height);
  ctx.clearRect(0, 0, a, d);
}

and it works correctly now

[nickofthyme]

Are there any cases where we would not want the full implementation and instead just want to mock out any canvas elements in unit tests?

[markov00]

Are there any cases where we would not want the full implementation and instead just want to mock out any canvas elements in unit tests?

Probably in most cases, but the think is that the jest-canvas-mock doesn't mocks everything correctly see hustcc/jest-canvas-mock#86 and hustcc/jest-canvas-mock#85 so we can switch it off completely.
The other benefit from the canvas only library is that we can "rely" on a real implementation for the textMeasure API in canvas, where the mock just return the string length.

[markov00]

jenkins test this

retrying due to failure on linking a c++ lib required by canvas https://kibana-ci.elastic.co/job/elastic+elastic-charts+pull-request/2146/

[markov00]

There are two possible solutions to the above-mentioned issue in Jenkins:

• ask Infra if these libraries are available in the Jenkins installation and in case add the correct PATH to LD_LIBRARY_PATH as described in https://stackoverflow.com/questions/20357033/usr-lib-x86-64-linux-gnu-libstdc-so-6-version-cxxabi-1-3-8-not-found
• we don't need the canvas package when running VRTs. It's picked up automatically by the jest environment, but we don't really need it, @nickofthyme do you know if we can run yarn install ignoring the canvas package? should we just run yarn remove canvas after the install?

[markov00]

jenkins test this
the last run was successful without changes: https://kibana-ci.elastic.co/job/elastic+elastic-charts+pull-request/2150/

[nickofthyme]

@markov00 It seems to be using the canvas on the VRT which it should not

04:46:47  FAIL  integration/tests/interactions.test.ts
04:47:39   ● Test suite failed to run
04:47:39 
04:47:39     /lib64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by /var/lib/jenkins/workspace/elastic+elastic-charts+pr-vrts/node_modules/canvas/build/Release/canvas.node)
04:47:39 
04:47:39       at Runtime._loadModule (../node_modules/jest-runtime/build/index.js:893:29)
04:47:39       at Object.<anonymous> (../node_modules/canvas/lib/bindings.js:3:18)

[nickofthyme]

🎉 This PR is included in version 36.0.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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