Changelog: 🚀

👋 **[Support Styleguidist](https://opencollective.com/styleguidist) on Open Collective** 👋

## New features

* Added support for external links in sections ([styleguidist#921](styleguidist#921) by @BTMPL)

Two flags added to `Sections` config:

* `href` - An URL to navigate to instead of navigating to the section content
* `external` - If set, the link will open in a new window

Fix: Support at-return as a synonym of at-returns

Simplify code a bit.

Fix: Appear page not found when a component is isolated (styleguidist…

…#1091)

Fix: Make slot components overridable (styleguidist#1087)

Fixes styleguidist#1070

Fix: Fix preview of method optional argument, JSDoc param and return …

…synonyms (styleguidist#1046)

Read 'param', 'arg', 'argument' JSDoc tags for method params, and 'return', 'returns' for method return value.

Fix: Fix section name regression

Fixes styleguidist#1078

Changelog: 🚀

## New features

* Add custom component display names ([styleguidist#933](styleguidist#933))

```
module.exports = {
  updateDocs(docs) {
    if (docs && docs.displayName) {
      docs.visibleName = docs.displayName.toLowerCase()
    }
    return docs
  }
}
```

* Made the mounting point id configurable. ([styleguidist#1050](styleguidist#1050))

## Bug fixes

* Cypress failing test ([styleguidist#1077](styleguidist#1077))

Fix: More bullet proof styles

max-width and background on body shouldn't break layout.

Fix: Restore support for evalInContext for custom slots (styleguidist…

…#1068)

Fixes styleguidist#1067

Fix: Add explicit recast dependency (styleguidist#1062)

Because react-docgen-displayname-handler has it as a peer dependency

Closes styleguidist#1061