Security upgrades

node_modules/@material-ui/styles/mergeClasses/mergeClasses.d.ts

@@ -0,0 +1,13 @@
+import * as React from 'react';
+
+export interface Classes {
+  [k: string]: string;
+}
+
+export interface MergeClassesOption {
+  baseClasses: Classes;
+  newClasses: Classes;
+  Component: React.ElementType;
+}
+
+export default function mergeClasses(options?: MergeClassesOption): Classes;