chore(deps): update dependency uglifyjs-webpack-plugin to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
uglifyjs-webpack-plugin	1.3.0 -> 2.2.0

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Release Notes

webpack-contrib/uglifyjs-webpack-plugin

v2.2.0

Compare Source

Features

• generate higher quality SourceMaps (#​408) (b1df135)

2.1.3 (2019-05-15)

Bug Fixes

• disable parallel on WSL (#​403) (7619736)
• fallback for cache directory (#​401) (d117827)

v2.1.3

Compare Source

v2.1.2

Compare Source

Bug Fixes

• invalidate cache after changing node version (#​396) (380bb54)

v2.1.1

Compare Source

Bug Fixes

• don't crash when no extracted comments (#​387) (68ad71c)

v2.1.0

Compare Source

Bug Fixes

• chunks is a Set in webpack@5 (#​365) (bf36e21)
• catch worker-farm errors (#​380) (aa7a9fc)
• dedupe extracted comments (#​383) (beaf1ad)
• more consistent cache (#​385) (f61439d)
• regenerate contenthash when assets was minified (#​386) (65a30da)

Features

• chunkFilter option for filtering chunks (#​382) (1e58c99)

2.0.1 (2018-09-18)

Bug Fixes

• decrease minimum required uglify-js version (#​357) (dc9d038)

v2.0.1

Compare Source

Bug Fixes

• decrease minimum required uglify-js version (#​357) (dc9d038)

v2.0.0

Compare Source

Bug Fixes

• default extract comment condition is case insensitivity

Features

• full coverage schema options validation
• enable inline optimization by default

BREAKING CHANGES

• Switch back to uglify-js (uglify-es is abandoned, if you need uglify ES6 code please use terser-webpack-plugin).
• Changed function signature for warningsFilter option (now first argument is warning, second is source).
• Enforces peerDependencies of "webpack": "^4.3.0.
• Enforces engines of "node": ">= 6.9.0 <7.0.0 || >= 8.9.0

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