`precision=double` fixes #291

Job	Run time
⛏ Data preparation	4s
📚 Generate Docs	11s
🕸 Build a Web library (web, template_release, wasm32, web.demo_build, lto=yes force_enabled_dd3d...	48s
🕸 Build a Web library (linux, editor, x86_64, linux.demo_build, lto=yes)	58s
🌐📦 Export Demo Project	26s
🏁 Finalization	9s
🌐 Deploy	38s
🔄 Restore gh-pages	0s
	3m 14s

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