Resolve nested entities

[smdenis]

var bemjson = {
    block: 'button2',
    mods: { theme: 'normal', size: 'm' },
    text: 'hello world',
    icon: {block: 'test', mods: {'test-mod': 'yes'}} // Resolve components in this case
};

[smdenis]

cc @Yeti-or

[coveralls]

Coverage decreased (-2.8%) to 96.735% when pulling 656f429 on creedencewright:smd.nested.blocks into cba2209 on bem-sdk:master.

[coveralls]

Coverage increased (+0.4%) to 100.0% when pulling 360e0a1 on creedencewright:smd.nested.blocks into cba2209 on bem-sdk:master.

[Yeti-or]

👍

[coveralls]

Coverage increased (+0.4%) to 100.0% when pulling ecc55d5 on creedencewright:smd.nested.blocks into cba2209 on bem-sdk:master.

[qfox]

Prob you should use arrow function here?

[coveralls]

Coverage increased (+0.4%) to 100.0% when pulling 9ac30f2 on creedencewright:smd.nested.blocks into cba2209 on bem-sdk:master.