Enable tree shaking in package.json

Author: Tpt

package.json

@@ -90,5 +90,6 @@
     "rdf-data-factory": "^1.1.0",
     "relative-to-absolute-iri": "^1.0.0",
     "sax": "^1.2.4"
-  }
+  },
+  "sideEffects": false
 }