Fix epsilon character in variable name

[VojtechVidra]

Fixes issue with epsilon character (let ε =) escaped to let \u03B5 = in bundled code. This issue breaks compilation in webpack with imported culori/require (bundled/culori.cjs).

[danburzo]

Thanks! Although this could also have been fixed with the --charset option in esbuild, it's probably best to just avoid non-ASCII identifiers altogether.

[danburzo]

Fixed in culori@3.1.3 https://github.com/Evercoder/culori/releases/tag/v3.1.3