added Bulgarian translations
added Bulgarian translations

i was unable to test it, since i got 

```
You are setting the validator locale to a locale that is not defined in the dicitionary. English messages may still be generated
```

and I am still getting use to VueJS
dfcook/vee-validate,baianat/vee-validate,danielgranat/vee-validate,logaretm/vee-validate,baianat/vee-validate,danielgranat/vee-validate,baianat/vee-validate,logaretm/vee-validate,dfcook/vee-validate,logaretm/vee-validate