update tarantool-python connector

[kbelyavs]

Some kind of loop:
Test-run depends on tarantool-python connector. In attempt to test with test-run tarantool-python itself, I got an error due to API mismatch, since test-run self imports relatively old connector parts.

One of possible solutions is to update connector version to match latest API.

[sergw]

It is good to show the steps how to reproduce the error. And environment:

• test-run branch
• tarantool branch
• OS version

[Totktonada]

@sergw It was observed in the scope of tarantool/tarantool-python#109 when we try to use test-run to test the connector (not tarantool).