Bump browserslist from 4.8.7 to 4.21.0 in /examples/lit-element

[dependabot[bot]]

Bumps browserslist from 4.8.7 to 4.21.0.

Changelog

Sourced from browserslist's changelog.

Change Log

This project adheres to Semantic Versioning.

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.

4.18.1

• Fixed case inventiveness for cover queries (by Pig Fang).
• Fixed since 1970 query for null in release date (by Pig Fang).

4.18

• Added --ignore-unknown-versions CLI option (by Pig Fang).

4.17.6

... (truncated)

Commits

• 9d867be Release 4.21 version
• 1dd18ef Fix ChangeLog style
• 8f10a62 Use released update-browserslist-db version
• 90d04ae Fix reading package.json with Unicode BOM
• 37a3847 Mark Internet Explorer as dead (#701)
• c4eaa6d Add update tool to list
• e314923 Fix docs
• eef5a2f Update update-db docs
• 7e019ce Move update DB script to another project
• 1706a04 Split Tools section
• Additional commits viewable in compare view

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