Bump terser from 4.8.0 to 5.0.0

[dependabot-preview[bot]]

Bumps terser from 4.8.0 to 5.0.0.

Changelog

Sourced from terser's changelog.

v5.0.0

• in operator now taken into account during property mangle.
• Fixed infinite loop in face of a reference loop in some situations.
• Kept exports and imports around even if there's something which will throw before them.
• The main exported bundle for commonjs, dist/bundle.min.js is no longer minified.

v5.0.0-beta.0

• BREAKING: minify() is now async and rejects a promise instead of returning an error.
• BREAKING: Internal AST is no longer exposed, so that it can be improved without releasing breaking changes.
• BREAKING: Lowest supported node version is 10
• Module is now distributed as a dual package - You can import and require() too.
• Inline improvements were made

Commits

• aacd577 5.0.0
• 262a813 update changelog
• 9dab78c npm audit fix
• c1fc7c4 fix yield tests
• 9254d2c check for source-map option before reading it in CLI
• 5f7b4a1 take in operator into account in property mangling. Closes #748
• 3178c3b fix bug with eval and reference loop. Closes #741
• e997c10 leave import/export around in unreachable code. Closes #718
• 05261a0 add missing main file
• 9b3f851 update typings
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #163.