Update dependency gh-pages to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
gh-pages	3.2.3 -> 4.0.0

• [x] PR contains the label that identifies the area, one of: area:operator, area:chart
• [ ] If the PR is targeting a Helm chart, add the chart label, e.g. chart:provider-postgresql

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Release Notes

tschaub/gh-pages

### [`v4.0.0`](https://togithub.com/tschaub/gh-pages/blob/HEAD/changelog.md#v400) [Compare Source](https://togithub.com/tschaub/gh-pages/compare/v3.2.3...v4.0.0) This release doesn't include any breaking changes, but due to updated development dependencies, tests are no longer run on Node 10. - [#​432](https://togithub.com/tschaub/gh-pages/pull/432) - Updated dev dependencies and formatting ([@​tschaub](https://togithub.com/tschaub)) - [#​430](https://togithub.com/tschaub/gh-pages/pull/430) - Bump ansi-regex from 3.0.0 to 3.0.1 ([@​tschaub](https://togithub.com/tschaub)) - [#​431](https://togithub.com/tschaub/gh-pages/pull/431) - Bump path-parse from 1.0.6 to 1.0.7 ([@​tschaub](https://togithub.com/tschaub)) - [#​427](https://togithub.com/tschaub/gh-pages/pull/427) - Bump async from 2.6.1 to 2.6.4 ([@​tschaub](https://togithub.com/tschaub)) - [#​423](https://togithub.com/tschaub/gh-pages/pull/423) - Bump minimist from 1.2.5 to 1.2.6 ([@​tschaub](https://togithub.com/tschaub))

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