Update VM

[ixje]

What current issue(s) does this address, or what feature is it adding?

• update to match Improve the performance of NeoVM neo-project/neo-vm#95 and Revert the restrictions of NUMEQUAL and NUMNOTEQUAL neo-project/neo-vm#126
• resolve memory leak when executing invocation transactions

How did you solve this problem?

How did you make sure your solution works?

• for the VM update I ran the newer JSON test files + make test
• for the VM memory leak I ran this test before and after fixing and confirmed the memory usage now stays low

import unittest
import binascii
from neo.VM.ExecutionEngine import ExecutionEngine
from neo.VM import InteropService
from neo.Core.Cryptography.Crypto import Crypto
from pympler.tracker import SummaryTracker


class VMLeak(unittest.TestCase):
    def test_vm_context_leak(self):
        service = InteropService.InteropService()
        script_container = None
        script_table = None
        tracker = SummaryTracker()
        for _ in range(10000):
            engine = ExecutionEngine(crypto=Crypto.Default(), service=service, container=script_container, table=script_table, exit_on_error=True)
            script_data = binascii.unhexlify('00C57655C86B00C5766AC86A56C86C')
            engine.LoadScript(script_data)
            engine.Execute()
        tracker.print_diff()

Are there any special changes in the code that we should be aware of?

Please check the following, if applicable:

• Did you add any tests?
• Did you run make lint?
• Did you run make test?
• Are you making a PR to a feature branch or development rather than master?
• Did you add an entry to CHANGELOG.rst? (if not, please do)

[coveralls]

Coverage increased (+0.004%) to 86.908% when pulling eedb575 on ixje:vm-update into 56a4240 on CityOfZion:development.