message: Update Jest README.md
diff: @@ -42,6 +42,22 @@ module.exports = {
  };
  ```
  +### Ignore Stylable files from exsiting css integrations
  +To prevent existing CSS integrations from affecting Stylable files, ignore '.st.css' in the integration configuration.
  +
  +Change:
  +```js
  +"moduleNameMapper": {
  + "\\.(css|scss)$": "SOME_MOCK_PATH"
  +},
  +```
  +To:
  +```js
  +"moduleNameMapper": {
  + "(?<!\\.st)\\.(css|scss)$": "SOME_MOCK_PATH"
  +},
  +```
  +
  ### Ignoring `node_modules` stylesheets
  To disable transformation for stylehseets originating from your `node_modules` add the following configuration:
  