Add numeric separator

Increase the readability of long numbers and uncommon number formats by adding underscore separators.

Modernization
ES2021
P42 for VS Code
P42 for GitHub
Add numeric separator

Why is this refactoring helpful?

Long numbers can be hard to read, especially when they are in binary or hexadecimal formats. Separators break up a long number into more readable segments.

What do I need to consider?

Numeric separators are an ES2021 feature. They are supported on all modern browsers and on Node 12.5+, but for older browsers and Node versions transpilation might be required (compatibility).

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