Fix wrong order of closing brackets in expandable trigger

[battaglr]

A wrong order of the closing brackets in some ch-expandable-trigger selectors caused a regression in the CSS output.

v1.1.1

.ch-expandable-trigger { ... }
.ch-expandable-trigger:active { ... }
- .ch-expandable-trigger:visited { ... }
- .ch-expandable-trigger:hover { ... }

v2.0.1

.ch-expandable-trigger { ... }
.ch-expandable-trigger:active { ... }
+ .ch-expandable-trigger:active:visited { ... }
+ .ch-expandable-trigger:active:hover { ... }

This PR fixes that regression.