chore(deps-dev): bump gulp-sourcemaps from 2.6.5 to 3.0.0

Bumps [gulp-sourcemaps](https://github.com/gulp-sourcemaps/gulp-sourcemaps) from 2.6.5 to 3.0.0.
- [Release notes](https://github.com/gulp-sourcemaps/gulp-sourcemaps/releases)
- [Commits](https://github.com/gulp-sourcemaps/gulp-sourcemaps/commits)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -43,7 +43,7 @@
     "gulp-optimize-js": "^1.1.0",
     "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.1.0",
-    "gulp-sourcemaps": "^2.6.5",
+    "gulp-sourcemaps": "^3.0.0",
     "gulp-standard": "^14.0.0",
     "gulp-svgmin": "^3.0.0",
     "gulp-uglify": "^3.0.2",