[core] Update to the latest version of the main repo (mui#456)

.stylelintrc.js

@@ -1,18 +1,5 @@
-// const baseline = require('@material-ui/monorepo/.stylelintrc');
-
-// module.exports = {
-//   ...baseline,
-// }
+const baseline = require('@material-ui/monorepo/.stylelintrc');
 
 module.exports = {
-  processors: ['stylelint-processor-styled-components'],
-  extends: 'stylelint-config-standard',
-  rules: {
-    'value-no-vendor-prefix': true,
-    'property-no-vendor-prefix': true,
-    'no-empty-source': null,
-    'no-missing-end-of-source-newline': null,
-    'declaration-colon-newline-after': null,
-    'value-keyword-case': null,
-  },
+  ...baseline,
 };

packages/grid/data-grid/src/DataGrid.test.tsx

@@ -1,4 +1,3 @@
-/* eslint-disable react/forbid-foreign-prop-types */
 import * as React from 'react';
 import PropTypes from 'prop-types';
 // @ts-expect-error need to migrate helpers to TypeScript

packages/grid/x-grid/src/XGrid.test.tsx

@@ -105,6 +105,7 @@ describe('<XGrid />', () => {
   });
 
   describe('keyboard', () => {
+    /* eslint-disable material-ui/disallow-active-element-as-key-event-target */
     const KeyboardTest = () => {
       const data = useData(100, 20);
       const transformColSizes = (columns) => columns.map((column) => ({ ...column, width: 60 }));
@@ -153,6 +154,7 @@ describe('<XGrid />', () => {
       await raf();
       expect(getActiveCell()).to.equal('1-19');
     });
+    /* eslint-enable material-ui/disallow-active-element-as-key-event-target */
   });
 
   it('should resize the width of the columns', async () => {

yarn.lock

@@ -2935,11 +2935,11 @@
 
 "@material-ui/monorepo@https://github.com/mui-org/material-ui.git#master":
   version "4.11.0"
-  resolved "https://github.com/mui-org/material-ui.git#4502b9bbe18e15c532940e3ef83b513721298b24"
+  resolved "https://github.com/mui-org/material-ui.git#85ea4e56f306b27325ae6e33d5bc35db8e6288e5"
 
 "@material-ui/monorepo@https://github.com/mui-org/material-ui.git#next":
-  version "5.0.0-alpha.5"
-  resolved "https://github.com/mui-org/material-ui.git#f43417718baa7b25dd28ad32dc83f89bc19bef62"
+  version "5.0.0-alpha.13"
+  resolved "https://github.com/mui-org/material-ui.git#13f3e9d8db81b40e1b08f43e4d45e37f3926c37d"
 
 "@material-ui/styles@^4.10.0":
   version "4.10.0"