Update readme and changelog

CHANGELOG.md

@@ -8,10 +8,19 @@ tries to follow the [Keep a CHANGELOG](http://keepachangelog.com) convention.
 
 *
 
-## [v1.1.13](https://github.com/suda/tool-bar/compare/v1.1.13...v1.1.13) - 2019-10-02
+## [v1.2.0](https://github.com/suda/tool-bar/compare/v1.2.0...v1.1.12) - 2019-10-03
+
+⚠️ **Warning:** This version contains [breaking changes in ionicons](https://github.com/suda/tool-bar/issues/264).
+Icons have been renamed by the Ionicons team, and now the iOS versions require `ios-` prefix and the Material ones require `md-` prefix.
 
 * [Update ionicons icons (release v4.5.10-1)](https://github.com/suda/tool-bar/pull/263) (by [@ericcornelissen](https://github.com/ericcornelissen))
 
+## [v1.1.13](https://github.com/suda/tool-bar/compare/v1.1.13...v1.1.13) - 2019-10-02
+
+**Note:** This version has been unpublished and published again as 1.2.0 due to [breaking changes in ionicons](https://github.com/suda/tool-bar/issues/264).
+
+* ~~[Update ionicons icons (release v4.5.10-1)](https://github.com/suda/tool-bar/pull/263) (by [@ericcornelissen](https://github.com/ericcornelissen))~~
+
 ## [v1.1.12](https://github.com/suda/tool-bar/compare/v1.1.12...v1.1.11) - 2019-07-11
 
 * [Update `font-awesome` to 5.9.0 including brand icons](https://github.com/suda/tool-bar/pull/257) (by [@malnvenshorn](https://github.com/malnvenshorn))

README.md

@@ -130,7 +130,8 @@ export function consumeToolBar(getToolBar) {
 
   // Using custom icon set (Ionicons)
   const button = toolBar.addButton({
-    icon: 'gear-a',
+    // For Material style icons, use md- prefix instead
+    icon: 'ios-gear-a',
     callback: 'application:show-settings',
     tooltip: 'Show Settings',
     iconset: 'ion'
@@ -253,7 +254,7 @@ cleanup when the `tool-bar` is deactivated but your package continues running.
 ## Supported icon sets
 
 *   [Octicons](https://octicons.github.com) (Atom's flavour)
-*   [Ionicons](http://ionicons.com) (`ion`)
+*   [Ionicons](http://ionicons.com) (`ion` with `ios-` and `md-` prefixes for the icon names)
 *   [FontAwesome](https://fontawesome.com/) (`fa` and `fab` for brands)
 *   [Foundation](http://zurb.com/playground/foundation-icon-fonts-3) (`fi`)
 *   [IcoMoon](https://icomoon.io) (`icomoon`)