Fix
* fix: reuse existing node, group and relationship instances after reconnect ([`ead401b`](https://github.com/FreshlyBrewedCode/pymee/commit/ead401b484e30f7030059bda8538f3436d403411))
Style
* style: reformat code with black ([`daf3e65`](https://github.com/FreshlyBrewedCode/pymee/commit/daf3e6528af5e80257da3e2421e31be56e92b9db))