Remove named exports from CSS module typings (#6723)

- They didn't exist anyway so this now causes compile time errors
  instead of runtime ones

Signed-off-by: Sebastian Malton <sebastian@malton.name>

Signed-off-by: Sebastian Malton <sebastian@malton.name>

tsconfig.json

@@ -34,7 +34,10 @@
     },
     "plugins": [
       {
-        "name": "typescript-plugin-css-modules"
+        "name": "typescript-plugin-css-modules",
+        "options": {
+          "namedExports": false
+        }
       }
     ]
   },