Fixed some typos in errors

ref #76

src/errors/AddressErrors.ts

@@ -9,11 +9,11 @@ export class AddressWrongTypeError extends NotAcceptableError {
 	name = "AddressWrongTypeError"
 
 	@IsString()
-	message = "The address must be an existing adress's id. \n You provided a object of another type."
+	message = "The address must be an existing address's id. \n You provided a object of another type."
 }
 
 /**
- * Error to throw, when a non-existant address get's loaded.
+ * Error to throw, when a non-existent address get's loaded.
  */
 export class AddressNotFoundError extends NotFoundError {
 	@IsString()