chore(deps): update dependency terser-webpack-plugin to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
terser-webpack-plugin	devDependencies	major	^4.2.3 -> ^5.0.0

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Release Notes

webpack-contrib/terser-webpack-plugin

v5.0.0

Compare Source

⚠ BREAKING CHANGES

• webpack@4 no longer supported
• removed the cache option
• removed the cacheKeys option
• removed the sourceMap option (respect the devtool option by default)

Bug Fixes

• reduce deps
• performance improvement

4.2.3 (2020-10-07)

Bug Fixes

• better minimizing mjs assets (#​329) (041b392)
• minify cjs assets (#​328) (b9c694d)

4.2.2 (2020-09-19)

Bug Fixes

• related asset info (a75dc8b)

4.2.1 (2020-09-15)

Bug Fixes

• cache for extracted comments (#​314) (5340814)
• compatibility with webpack@5 (f5bd8f8)

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