fix precision difference for sketch mode running on different architectures

[alixander]

there's something inside here that's causing sketch tests to be different when run on amd and arm architectures (e.g. M1 macbook and intel macbook).

To reproduce:

Requires a machine that can run both architectures (I'm on M1 macbook which can run both), or VM environments or such

Run
GOARCH=arm64 TESTDATA_ACCEPT=1 ./ci/test.sh ./d2renderers/d2sketch/ -count=1

Notice nothing changes. (the red asterisk in my terminal means changed files). This is the architecture that our CI runs on.

Run
GOARCH=amd64 TESTDATA_ACCEPT=1 ./ci/test.sh ./d2renderers/d2sketch/ -count=1

Notice there are changes!

I'm not sure if this issue is in rough.js, the JS engine (goja), rounding on architectures, or something in our code reading/writing data from/to rough.js.

[alixander]

was a go compiler bug, nonissue after bumping to 1.20 #1020

[alixander]

sad, it was not.

[alixander]

/bounty $220

(trying out this new service i saw on HN. it's an experiment to try to incentivize someone to solve this annoying thing no one wants to do. just a one-time thing for now)

[algora-pbc]

💎 $220.00 bounty created by alixander
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[algora-pbc]

💡 ifndev submitted a pull request that claims the bounty. You can visit your org dashboard to reward.

[algora-pbc]

🎉🎈 @ifndev has been awarded $220.00! 🎈🎊