fix: Add "boolean" and "symbol" types for "key" attribute. (#2614)
fix: Add "boolean" and "symbol" types for "key" attribute. (#2614)

Booleans as keys are supported since v2.4.2 and symbols since v2.5.12.
Jinjiang/vuejs.org,vuejs-fr/vuejs.org,vuejs-fr/vuejs.org,Jinjiang/vuejs.org,vuejs/vuejs.org,vuejs/vuejs.org