Fix Drawer with the new material-ui version and update yarn.lock

Author: agustin107

example/src/menu/Menu.tsx

@@ -27,31 +27,33 @@ class RawMenuAppBar extends React.Component<any, any> {
     const { drawerOpen } = this.state;
 
     return (
-      <AppBar position="static" className={classes.toolbar}>
-        <Toolbar>
-          <Hidden only={['lg', 'xl']}>
-            <IconButton
-              className={classes.menuButton}
-              color="inherit"
-              aria-label="Menu"
-              onClick={this.toggleDrawer(true)}
-            >
-              <MenuIcon />
-            </IconButton>
-          </Hidden>
-          <div className={classes.flexCtr}>
-            <Typography variant="h6" color="inherit">
-              {pkg.name}
-            </Typography>
-          </div>
-        </Toolbar>
+      <>
+        <AppBar position="static" className={classes.toolbar}>
+          <Toolbar>
+            <Hidden only={['lg', 'xl']}>
+              <IconButton
+                className={classes.menuButton}
+                color="inherit"
+                aria-label="Menu"
+                onClick={this.toggleDrawer(true)}
+              >
+                <MenuIcon />
+              </IconButton>
+            </Hidden>
+            <div className={classes.flexCtr}>
+              <Typography variant="h6" color="inherit">
+                {pkg.name}
+              </Typography>
+            </div>
+          </Toolbar>
+        </AppBar>
         <LeftDrawer
           open={drawerOpen}
           toggleDrawer={this.toggleDrawer}
           onSelectMenuItem={onSelectMenuItem}
           selectedMenuItem={selectedMenuItem}
         />
-      </AppBar>
+      </>
     );
   }
 }

yarn.lock

@@ -6578,23 +6578,6 @@ scheduler@^0.16.2:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
 
-scheduler@^0.16.2:
-  version "0.16.2"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.16.2.tgz#f74cd9d33eff6fc554edfb79864868e4819132c1"
-  integrity sha512-BqYVWqwz6s1wZMhjFvLfVR5WXP7ZY32M/wYPo04CcuPM7XZEbV2TBNW7Z0UkguPTl0dWMA59VbNXxK6q+pHItg==
-  dependencies:
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-
-schema-utils@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-1.0.0.tgz#0b79a93204d7b600d4b2850d1f66c2a34951c770"
-  integrity sha512-i27Mic4KovM/lnGsy8whRCHhc7VicJajAjTrYg11K9zfZXnYIt4k5F+kZkwjnrhKzLic/HLU4j11mjsz2G/75g==
-  dependencies:
-    ajv "^6.1.0"
-    ajv-errors "^1.0.0"
-    ajv-keywords "^3.1.0"
-
 scoped-regex@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/scoped-regex/-/scoped-regex-2.1.0.tgz#7b9be845d81fd9d21d1ec97c61a0b7cf86d2015f"