Reflect that the API doesn't list properties as required

clickup/custom_task_types.go

@@ -9,24 +9,24 @@ type CustomTaskTypesService service
 
 // See https://clickup.com/api/clickupreference/operation/GetCustomItems/
 type GetCustomTaskTypesResponse struct {
-	CustomItems []CustomItem `json:"custom_items"` // Array of custom task types.
+	CustomItems []CustomItem `json:"custom_items,omitempty"` // Array of custom task types.
 }
 
 // See https://clickup.com/api/clickupreference/operation/GetCustomItems/
 type CustomItem struct {
-	Id          int32  `json:"id"`          // Custom task type ID.
-	Name        string `json:"name"`        // Custom task type name.
-	NamePlural  string `json:"name_plural"` // Custom task type plural name.
-	Description string `json:"description"` // Custom task type description.
+	Id          int32  `json:"id,omitempty"`          // Custom task type ID.
+	Name        string `json:"name,omitempty"`        // Custom task type name.
+	NamePlural  string `json:"name_plural,omitempty"` // Custom task type plural name.
+	Description string `json:"description,omitempty"` // Custom task type description.
 
 	// Not documented in API explorer
-	Avatar CustomItemAvatar `json:"avatar"` // Custom task icon data.
+	Avatar CustomItemAvatar `json:"avatar,omitempty"` // Custom task icon data.
 }
 
 // Not documented in API explorer. Comments are observations.
 type CustomItemAvatar struct {
-	Source string `json:"source"` // null (ClickUp Milestone Glyph), fas (Font Awesome Solid), fab (Font Awesome Brands).
-	Value  string `json:"value"`  // null is for ClickUp Glyphs, e.g., Task and Milestone.
+	Source string `json:"source,omitempty"` // null (ClickUp Milestone Glyph), fas (Font Awesome Solid), fab (Font Awesome Brands).
+	Value  string `json:"value,omitempty"`  // null is for ClickUp Glyphs, e.g., Task and Milestone.
 }
 
 // See https://clickup.com/api/clickupreference/operation/GetCustomItems/