chore(deps-dev): bump web-ext from 3.2.1 to 4.0.0

[dependabot-preview[bot]]

Bumps web-ext from 3.2.1 to 4.0.0.

Release notes

Sourced from web-ext's releases.

4.0.0

⚠ BREAKING CHANGES ⚠

• Dropped support for node.js 8 :wave:

Features

• Suggest matching commands (#1763)
• Updated web-ext lint to use addons-linter v1.19.0:
  • Imported Firefox 71 APIs schema (#2892)
  • Imported Firefox 72 APIs schema (#2964)
  • Updated list of known libraries
  • See all addons-linter changes: 1.14.0...1.19.0

Bug Fixes

• web-ext sign:
  • Fixed command timeout (fixed upstream in sign-addon v2) (#1773)
• web-ext run:
  • Fixed --start-url regression on multiple urls (#1707)
• web-ext run Firefox Desktop:
  • Enabled by default visibility of extension pages and content scripts logs in the BrowserConsole (#1725)
  • Reset browser.link.open_newwindow when running Firefox desktop (#1766)
• web-ext run Chromium Desktop:
  • Fixed intermittent Chromium extension runner startup failure on MacOS (#1779, #1796)
  • Removed default '--mute-audio' flag for chromium (#1775)

See all changes: 3.2.0...4.0.0

Commits

• 1bb5405 chore: Bump package version for release 4.0.0
• 09661ee fix: make wssBroadcast an async function (#1695)
• d9878f0 chore: Updated expected chrome-launcher v0.12.0 default flags
• 5d19f6c fix(deps): update dependency chrome-launcher to v0.12.0
• 2286ca1 fix(deps): update dependency git-rev-sync to v2 (#1789)
• a5edbf7 fix(deps): update dependency update-notifier to v4 (#1783)
• 11e590e chore(deps): update dependency nyc to v15 (#1800)
• b202d9b chore(deps): update dependency babel-plugin-istanbul to v6 (#1799)
• e1b96a6 chore(deps): update dependency sinon to v8 (#1798)
• a06ccf5 chore(deps): update dependency eslint to v6.8.0 (#1797)
• Additional commits viewable in compare view

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