Bump terser from 4.3.9 to 4.6.6

[dependabot-preview]

Bumps terser from 4.3.9 to 4.6.6.

Changelog

Sourced from terser's changelog.

v4.6.6

(hotfix release)

• Reverted code to 4.6.4 to allow for more time to investigate an issue.

v4.6.5 (REVERTED)

• Improved compress performance through using a new method to see if two nodes are equivalent, instead of printing them to a string.

v4.6.4

• The "some" value in the comments output option now preserves @lic and other important comments when using //
• </script> is now better escaped in regex, and in comments, when using the inline_script output option
• Fixed an issue when transforming new RegExp into /.../ when slashes are included in the source
• AST_Node.prototype.constructor now exists, allowing for easier debugging of crashes
• Multiple if statements with the same consequents are now collapsed
• Typescript typings improvements
• Optimizations while looking for surrogate pairs in strings

v4.6.3

• Annotations such as /*#__NOINLINE__*/ and /*#__PURE__*/ may now be preserved using the preserve_annotations output option
• A TypeScript definition update for the keep_quoted output option.

v4.6.2

• A bug where functions were inlined into other functions with scope conflicts has been fixed.
• /*#__NOINLINE__*/ annotation fixed for more use cases where inlining happens.

v4.6.1

• Fixed an issue where a class is duplicated by reduce_vars when there's a recursive reference to the class.

v4.6.0

• Fixed issues with recursive class references.
• BigInt evaluation has been prevented, stopping Terser from evaluating BigInts like it would do regular numbers.
• Class property support has been added

v4.5.1

(hotfix release)

• Fixed issue where () => ({})[something] was not parenthesised correctly.

v4.5.0

• Inlining has been improved
• An issue where keep_fnames combined with functions declared through variables was causing name shadowing has been fixed

... (truncated)

Commits

• 3a8db4e 4.6.6
• 2f026af update changelog
• 8b65878 quickly revert changes
• 12f9031 4.6.5
• f50f017 update changelog
• bee2d41 fix reverse walk
• 6ba84bc use walk() some more
• 9519884 lint
• fc08bf5 optimize equivalent_to and create simple walk function
• 81c2d9f 4.6.4
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #88.