Update resolvers-map.md

Author: kamilmysliwiec

content/graphql/resolvers-map.md

@@ -63,7 +63,7 @@ type Author {
 
 The `@Field()` decorator accepts an optional type function (e.g., `type => Int`), and optionally an options object.
 
-The type function is required when there's the potential for ambiguity between the TypeScript type system and the GraphQL type system. Specifically: it is **not** required for `string` and `boolean` types; it **is** required for arrays, numbers (which must be mapped to either a GraphQL `Int` or `Float`) and object types. The type function should simply return the desired GraphQL type (as shown in various examples in these chapters).
+The type function is required when there's the potential for ambiguity between the TypeScript type system and the GraphQL type system. Specifically: it is **not** required for `string` and `boolean` types; it **is** required for (which must be mapped to either a GraphQL `Int` or `Float`). The type function should simply return the desired GraphQL type (as shown in various examples in these chapters).
 
 The options object can have any of the following key/value pairs: