chore: update contributors

Author: daviddias

package.json

@@ -56,7 +56,10 @@
     "Enrico Marino <enrico.marino@email.com>",
     "Friedel Ziegelmayer <dignifiedquire@gmail.com>",
     "Mitar <mitar.github@tnode.com>",
+    "Real Harry <sidewaybot@gmail.com>",
     "Richard Littauer <richard.littauer@gmail.com>",
+    "Victor Bjelkholm <victorbjelkholm@gmail.com>",
+    "Volker Mische <volker.mische@gmail.com>",
     "greenkeeper[bot] <greenkeeper[bot]@users.noreply.github.com>",
     "kumavis <kumavis@users.noreply.github.com>"
   ]