chore(web-components): upgrade to Stencil 4.3

[ad9242]

Summary of the changes

Upgrades Stencil version to 4.3

Related issue

#1131

Checklist

• Relevant unit tests and visual regression tests added.
• Visual testing against Figma component specification completed.
• All acceptance criteria reviewed and met.
• Accessibility Insights FastPass performed.
• A11y unit test added and yields no issues.
• A11y plug-in on Storybook yields no issues.
• Manual screen reader testing performed using NVDA and VoiceOver.
• Page can be zoomed to 400% with no loss of content.
• Screen magnifier used with no issues.
• Text resized to 200% with no loss of content.
• Text spacing increased as per the WCAG 1.4.12 success criterion with no loss of content.
• Browser setting 'prefers reduced motion' tested. No animations or motion visible whilst this setting is on.
• Windows High Contrast mode tested with no loss of content.
• System light and dark mode tested with no loss of content.
• Manual keyboard testing for keyboard controls and logical focus order.
• Min/max content examples tested with no loss of content or overflow.
• Browser support tested (Chrome, Safari, Firefox and Edge).
• Correct roles used and ARIA attributes used correctly where required.
• Logical heading structure is maintained, and the HTML elements used for headings can be changed to fit within the wider page structure.
• All prop combinations work without issue.

[github-actions]

View your branch deployment here: https://mi6.github.io/ic-ui-kit/branches/stencil-4.3-upgrade/web-components
View your React branch deployment here: https://mi6.github.io/ic-ui-kit/branches/stencil-4.3-upgrade/react