Security upgrades

node_modules/@material-ui/system/memoize.js

@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = memoize;
+
+function memoize(fn) {
+  var cache = {};
+  return function (arg) {
+    if (cache[arg] === undefined) {
+      cache[arg] = fn(arg);
+    }
+
+    return cache[arg];
+  };
+}