Add support for BigInt literals in javascript code validation

[droland1]

Chrome now supports the type BigInt for javascript code. This includes support for BigInt literals:

var n = 13135151n;

Visual Studio tags these literals as syntax errors. Coders can avoid these errors by instead using:

var n = BigInt("1313515");

It would be great if Visual Studio supported the literal notation.

[vscodebot]

(Experimental duplicate detection)
Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• Find in files pattern can't include a newline (#50573)

[mjbvz]

Tracked upstream by microsoft/TypeScript#15096