Move typeOf methods to `bem-entity-name` package

[blond]

• [x] add typeOf method to BemEntityName: We can use type field in BemEntityName instance.
• [x] remove typeOf method.

[blond]

Related https://github.com/bem-sdk/bem-entity/issues/25

[blond]

let's remove validate method and will move it to bem-entity-part.

If we want validate string we can use parse method:

const bemNaming = require('bem-naming');

bemNaming.parse('9#$%85#$'); // undefined

If we want validate object or BemEntityPart instance we can use typeOf method:

const BemEntityPart = require('bem-entity-part');

BemEntityPart.typeOf({ elem: 'bla' }); // undefined

[blond]

Fixed in #145