Update dependency uglify-js to v3.15.1

Created by: renovate[bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
uglify-js	3.15.0 -> 3.15.1

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Release Notes

mishoo/UglifyJS

v3.15.1

Compare Source

Features

• collapse global assignments (5c863b7)
• speed up max_line_len & preserve_line (371d259)
• support custom indentation (e4a91a8)
• improve compression of conditional return chains (d7eb80b, aad5d6e)

Bug Fixes

• arguments object (77552d9)
• class literal (e7d6dd2)
• compound assignment operator (0a5a1f3)
• default parameter (67438f3, 9a91a7a, d338e45)
• destructuring syntax (67438f3)
• function literal (3693bde)
• global constant property (6fb7de7)
• lexical declaration (18f0045, 28943bc, b106cd9)
• logical assignment operator (0a5a1f3)
• template literal (371d259)
• var statement (8ceb4b0, fa30960)

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Configuration

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