Bump terser from 4.6.3 to 4.6.4

Created by: dependabot-preview[bot]

Bumps terser from 4.6.3 to 4.6.4.

Changelog

Sourced from terser's changelog.

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

Commits

• 81c2d9f 4.6.4
• 98f82ab update changelog
• 5a8f9a0 use mochallel again
• 8e27417 preserve @license comments starting with //. Closes #560
• 5dc8772 escape </script> in comments and regexp. Closes #568
• be65707 fix unsafe RegExp constructor to regex transformation when slashes are involv...
• fb0c69e Update terser.d.ts (#569)
• 1310934 Set AST_Node.prototype.constructor. (#574)
• 9e2ff84 Collapse multiple if-statements with the same consequents (#555)
• f660066 [ts] Add missing wrap_func_args property to OutputOptions (#557)
• Additional commits viewable in compare view

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