Update README.md

Mention the new @scope at-rule

Author: Wiktor102

README.md

@@ -93,9 +93,10 @@ This function is the easiest way to set up webpack loaders for __css and scoped
 ### WebpackCssScopeLoader options
 * `componentId: string` - Required (only if using the loader directly). A unique ID to identify the scope/component.
 * `attribute: string = "data-style"` - Specifies what attribute will be used to identify the scope.
-* `scopeEnd: "scope"|"tree" = "scope"` - Specify where the scope ends:
+* `scopeEnd: "scope"|"tree" = "scope"` - Specifies where the scope ends:
   - `scope` - The default. Using this setting, the scope ends where another scope begins. That is - the styles of the parent scope do not "leak" into the children that have their own scope. This is done using complex css selectors, so performance may be decreased. **Note: some css properties may still affect the children scope if they're inherited (ex. font, color, etc.)!**
   - `tree` - The scope continues until the very bottom of the DOM. Styles of the parent scope may affect elements in the lower/deeper scopes.
+  - As from v0.2.0, this setting may be overwritten in individual files by using the `@scope` directive at the very top. Both `@scope tree;` and `@scope scope;` are valid.
 
 ### WebpackScopedCssModulesLoader options
 * `componentId: string` - Required. A unique ID to identify the scope/component. It must be the same as the `componentId` provided to the WebpackCssScopeLoader for each file.