Added active url to index export (#23)

Author: EranNL

src/rules/index.ts

@@ -1,4 +1,5 @@
 export { default as min } from '@/rules/min';
 export { default as max } from '@/rules/max';
 export { default as required } from '@/rules/required';
+export { default as activeUrl } from '@/rules/activeUrl';
 export { IncorrectArgumentTypeError } from '@/rules/IncorrectArgumentTypeError';