fix(deps): update terser to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
terser	dependencies	major	^3.16.1 -> ^4.0.0	source

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Release Notes

fabiosantoscode/terser

v4.0.0

Compare Source

• breaking change: The variables property of all scopes has become a standard JavaScript Map as opposed to the old bespoke Dictionary object.
• Typescript definitions were fixed
• terser --help was fixed
• The public interface was cleaned up
• Fixed optimisation of Array and new Array
• Added the keep_quoted=strict mode to mangle_props, which behaves more like Google Closure Compiler by mangling all unquoted property names, instead of reserving quoted property names automatically.
• Fixed parent functions' parameters being shadowed in some cases
• Allowed Terser to run in a situation where there are custom functions attached to Object.prototype
• And more bug fixes, optimisations and internal changes

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[wKovacs64]

🎉 This PR is included in version 1.1.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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