Security upgrades

node_modules/@material-ui/styles/es/makeStyles/multiKeyStore.js

@@ -0,0 +1,22 @@
+// Used https://github.com/thinkloop/multi-key-cache as inspiration
+const multiKeyStore = {
+  set: (cache, key1, key2, value) => {
+    let subCache = cache.get(key1);
+
+    if (!subCache) {
+      subCache = new Map();
+      cache.set(key1, subCache);
+    }
+
+    subCache.set(key2, value);
+  },
+  get: (cache, key1, key2) => {
+    const subCache = cache.get(key1);
+    return subCache ? subCache.get(key2) : undefined;
+  },
+  delete: (cache, key1, key2) => {
+    const subCache = cache.get(key1);
+    subCache.delete(key2);
+  }
+};
+export default multiKeyStore;