[FEATURE]: Subscriptable objects by other than `name`

[bontchev]

Feature Details

Currently, when using subscriptable objects, an object (technique, tactic, etc.) can be addressed only by the name field:

from enterpriseattack import Attack

attack = Attack(subscriptable=True)
print(attack.techniques.get('External Remote Services'))

This is hard-coded in the module. Would be nice if this parameter could be controlled by the user, e.g.

from enterpriseattack import Attack

attack = Attack(subscriptable=True, subscribe_to='id')
print(attack.techniques.get('T1133'))