Use native ESM and update dependencies

[pioug]

I basically did the same changes as this PR https://github.com/imagemin/imagemin-gifsicle/pull/53 to migrate CJS to ESM 😬

It's the last package among https://github.com/sindresorhus/gulp-imagemin/blob/main/package.json#L57-L60 that is still using CJS

	"optionalDependencies": {
		"imagemin-gifsicle": "^7.0.0",
		"imagemin-mozjpeg": "^9.0.0",
		"imagemin-optipng": "^8.0.0",
		"imagemin-svgo": "^9.0.0"
	},