Fix async node iterator

[mariusconjeaud]

Closes #798

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 91.66667% with 2 lines in your changes are missing coverage. Please review.

Please upload report for BASE (rc/5.3.1@b32e169). Learn more about missing BASE report.

Files	Patch %	Lines
neomodel/async_/match.py	83.33%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## rc/5.3.1 #800 +/- ## =========================================== Coverage ? 91.38% =========================================== Files ? 34 Lines ? 4574 Branches ? 0 =========================================== Hits ? 4180 Misses ? 394 Partials ? 0 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud