Security upgrades

node_modules/@material-ui/system/esm/merge.js

@@ -0,0 +1,14 @@
+import { deepmerge } from '@material-ui/utils';
+
+function merge(acc, item) {
+  if (!item) {
+    return acc;
+  }
+
+  return deepmerge(acc, item, {
+    clone: false // No need to clone deep, it's way faster.
+
+  });
+}
+
+export default merge;