Merge pull request #540 from eXist-db/dependabot/npm_and_yarn/gulp-sourcemaps-3.0.0

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

Author: joewiz

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",