merge master into develop

[jkisse]

due to hotfix release 0.8.5

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (1cbe5b9) 85.05% compared to head (0d55a14) 85.05%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #556 +/- ## ======================================== Coverage 85.05% 85.05% ======================================== Files 90 90 Lines 6083 6083 ======================================== Hits 5174 5174 Misses 909 909 ``` | [Files Changed](https://app.codecov.io/gh/e2nIEE/pandapipes/pull/556?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=e2nIEE) | Coverage Δ | | |---|---|---| | [setup.py](https://app.codecov.io/gh/e2nIEE/pandapipes/pull/556?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=e2nIEE#diff-c2V0dXAucHk=) | `0.00% <0.00%> (ø)` | |

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