Refactor Entity typings in entity.ts

Changed the EntityKeys type to exclude keys from EntityInternal instead of just symbol and number. Also, fixed a formatting issue with the EntityDataValue type definition.

lib/entity/entity.ts

@@ -14,15 +14,15 @@ export type EntityInternal = {
 
 /** Defines the objects returned from calls to {@link Repository | repositories }. */
 export type Entity = EntityData & EntityInternal
-export type EntityKeys<T extends Entity> = Exclude<keyof T, symbol | number>
+export type EntityKeys<T extends Entity> = Exclude<keyof T, keyof EntityInternal>;
 
 /** The free-form data associated with an {@link Entity}. */
 export type EntityData = {
   [key: string]: EntityDataValue | EntityData | Array<EntityDataValue | EntityData>
 }
 
 /** Valid types for values in an {@link Entity}. */
-export type EntityDataValue = string | number | boolean | Date | Point | null | undefined | Array<EntityDataValue | EntityData>
+export type EntityDataValue = string | number | boolean | Date | Point | null | undefined | Array<EntityDataValue | EntityData>
 
 /** Defines a point on the globe using longitude and latitude. */
 export type Point = {