refactor(nom): update to the latest version

[coveralls]

Pull Request Test Coverage Report for Build 1405233977

• 783 of 836 (93.66%) changed or added relevant lines in 87 files are covered.
• 52 unchanged lines in 21 files lost coverage.
• Overall coverage increased (+0.04%) to 85.565%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tox_packet/src/dht/dht_request.rs	43	44	97.73%
tox_packet/src/dht/mod.rs	1	2	50.0%
tox_packet/src/friend_connection/mod.rs	1	2	50.0%
tox_packet/src/messenger/mod.rs	1	2	50.0%
tox_packet/src/messenger/typing.rs	9	10	90.0%
tox_packet/src/onion/inner_onion_request.rs	1	2	50.0%
tox_packet/src/onion/inner_onion_response.rs	1	2	50.0%
tox_packet/src/onion/onion_data_response.rs	12	13	92.31%
tox_packet/src/relay/data.rs	5	6	83.33%
tox_packet/src/relay/mod.rs	6	7	85.71%
<!--	Total:	783	836	93.66%	-->

Files with Coverage Reduction	New Missed Lines	%
tox_core/src/onion/client/paths_pool.rs	1	85.45%
tox_packet/src/dht/dht_request.rs	1	95.04%
tox_packet/src/messenger/conference/title.rs	1	87.5%
tox_packet/src/messenger/msi.rs	1	77.0%
tox_packet/src/relay/onion_request.rs	1	77.78%
tox_packet/src/messenger/conference/invite.rs	2	73.68%
tox_packet/src/messenger/conference/peer_online.rs	2	76.47%
tox_packet/src/messenger/conference/query_response.rs	2	90.77%
tox_packet/src/onion/onion_announce_response.rs	2	95.1%
tox_core/src/state_format/old.rs	3	82.58%
<!--	Total:	52		-->

Totals
Change from base Build 1405230274:	0.04%
Covered Lines:	14819
Relevant Lines:	17319

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💛 - Coveralls

[kpp]

That's a huge amout of work. Did it affect the binary size? I expect it to shrink a little bit.

[kurnevsky]

I didn't check, but it shouldn't affect it much. Ahync/await should be the biggest part of it.