build(deps): bump browserslist from 4.6.6 to 4.21.4

[dependabot[bot]]

Bumps browserslist from 4.6.6 to 4.21.4.

Changelog

Sourced from browserslist's changelog.

4.21.4

• Updated Firefox ESR.

4.21.3

• Improved unknown region and unknown feature error (by Alexander Chabin).

4.21.2

• Updated Firefox ESR.

4.21.1

• Fixed parsing days in since query.

4.21

• IE 11 was added to dead and removed from defaults (by Albert Portnoy).
• Added browserslist.parse() to get config AST for analysis.
• Moved --update-db script to update-browserslist-db tool.
• Fixed Unicode BOM support in package.json.

4.20.4

• Fixed Opera in mobileToDesktop (by Pig Fang).

4.20.3

• Added Baidu to dead browsers (by Igor Lukanin).

4.20.2

• Fixed package.funding URL format.

4.20.1

• Fixed package.funding.
• Fixed docs (by Michael Lohmann).

4.20

• Added last 2 node versions and last 2 node major versions (by @​g-plane).

4.19.3

• Updated Firefox ESR (by Christophe Coevoet).

4.19.2

• Fixed --help output.

4.19.1

• Fixed throwOnMissing types (by Øyvind Saltvik).

4.19

• Added queries grammar definition (by Pig Fang).
• Added throwOnMissing option (by Øyvind Saltvik).
• Fixed null data ignoring in < 50% in CN (byPig Fang).
• Fixed data parsing in in my stats (by Sun Xiaoran).
• Fixed yarn.lock support with integrity (by Alexey Berezin).
• Fixed Yarn Berry error message in --update-db.

... (truncated)

Commits

• 6f875c6 Release 4.21.4 version
• a5213e6 Fix size limit
• 56a7ba1 Update dependencies
• a57de33 Update Firefox ESR
• cb2098e Fix links of postcss-preset-env and postcss-normalize (#729)
• bfb9700 Update dependencies
• ec38d5d Move legacy section to bottom
• c9ff943 Update configs
• b5f1b5e Fix banners align
• 7a3559f Update docs
• Additional commits viewable in compare view

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