Update dependency gulp-ejs to v5

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gulp-ejs	devDependencies	major	^4.1.1 -> ^5.0.0

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Release Notes

rogeriopvl/gulp-ejs

### [`v5.0.0`](https://togithub.com/rogeriopvl/gulp-ejs/blob/master/CHANGELOG.md#v500) [Compare Source](https://togithub.com/rogeriopvl/gulp-ejs/compare/v4.1.2...v5.0.0) - Update ejs to `v3.0.1` (please read [ejs's changelog](https://togithub.com/mde/ejs/blob/master/CHANGELOG.md) for more info on discontinued ejs features)

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