Build(deps): Bump terser from 3.17.0 to 4.3.9

[dependabot-preview]

Bumps terser from 3.17.0 to 4.3.9.

Changelog

Sourced from terser's changelog.

v4.3.9

• Fixed issue with mangle's keep_fnames option, introduced when adding code to keep variable names of anonymous functions

v4.3.8

• Typescript typings fix

v4.3.7

• Parsing of regex options in the CLI (which broke in v4.3.5) was fixed.
• typescript definition updates

v4.3.6

(crash hotfix)

v4.3.5

• Fixed an issue with DOS line endings strings separated by \ and a new line.
• Improved fix for the output size regression related to unused references within the extends section of a class.
• Variable names of anonymous functions (eg: const x = () => { ... } or var func = function () {...}) are now preserved when keep_fnames is true.
• Fixed performance degradation introduced for large payloads in v4.2.0

v4.3.4

• Fixed a regression where the output size was increased when unused classes were referred to in the extends clause of a class.
• Small typescript typings fixes.
• Comments with @preserve, @license, @cc_on as well as comments starting with /*! and /**! are now preserved by default.

v4.3.3

• Fixed a problem where parsing template strings would mix up octal notation and a slash followed by a zero representing a null character.
• Started accepting the name async in destructuring arguments with default value.
• Now Terser takes into account side effects inside class extends clauses.
• Added parens whenever there's a comment between a return statement and the returned value, to prevent issues with ASI.
• Stopped using raw RegExp objects, since the spec is going to continue to evolve. This ensures Terser is able to process new, unknown RegExp flags and features. This is a breaking change in the AST node AST_RegExp.

v4.3.2

• Typescript typing fix
• Ensure that functions can't be inlined, by reduce_vars, into places where they're accessing variables with the same name, but from somewhere else.

v4.3.1

• Fixed an issue from 4.3.0 where any block scope within a for loop erroneously had its parent set to the function scopee
• Fixed an issue where compressing IIFEs with argument expansions would result in some parameters becoming undefined
• addEventListener options argument's properties are now part of the DOM properties list.

v4.3.0

... (truncated)

Commits

• e7e4208 4.3.9
• 3f3fac3 update changelog
• ee8603a fix issue with MangleOptions.keep_fnames #490
• d7cc554 dedent everything
• a628515 4.3.8
• 8d82e3b update changelog
• 9bfd552 remove duplicate toplevel typing
• 9518629 4.3.7
• 30070a2 update changelog
• 8ddc1b9 small doc fix
• Additional commits viewable in compare view

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