build(deps-dev): bump follow-redirects from 1.7.0 to 1.15.4 in /demo

[dependabot[bot]]

Bumps follow-redirects from 1.7.0 to 1.15.4.

Commits

• 6585820 Release version 1.15.4 of the npm package.
• 7a6567e Disallow bracketed hostnames.
• 05629af Prefer native URL instead of deprecated url.parse.
• 1cba8e8 Prefer native URL instead of legacy url.resolve.
• 72bc2a4 Simplify _processResponse error handling.
• 3d42aec Add bracket tests.
• bcbb096 Do not directly set Error properties.
• 192dbe7 Release version 1.15.3 of the npm package.
• bd8c81e Fix resource leak on destroy.
• 9c728c3 Split linting and testing.
• Additional commits viewable in compare view

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