fix: added exports to the index file

Author: ziccardi

src/index.ts

@@ -1,3 +1,6 @@
 export {Validator} from './Validator';
 export {Data} from './Data';
 export {ValidatorConfig} from './config/ValidatorConfig';
+export {EvaluationResult} from './Rule';
+export {RuleBuilder} from './rules/RuleBuilder';
+export {validatorBuilder} from './ValidatorBuilder';