Update type definition of defineQuery/defineSystem (#26)

* Update type definition of defineQuery/defineSystem

* Update type definition of defineQuery/defineSystem

* Update type definition of defineQuery/defineSystem

Author: cmbartschat

docs/api/studio/ecs/ecs.mdx

@@ -132,15 +132,15 @@ ecs.defineState(name).wait(waitTime: number, nextState: string | State) // -> vo
 Define a system.
 
 ``` ts
-ecs.defineSystem([terms]: string[], behavior: function) // -> System
+ecs.defineSystem(terms: RootAttribute[], behavior: function) // -> function
 ```
 
 ### defineQuery
 
 Define a query.
 
 ``` ts
-ecs.defineQuery([terms: string]) // -> callback
+ecs.defineQuery(terms: RootAttribute[]) // -> function
 ```
 
 ### getAttribute