Added function for adding the reverse edges.

[codecov[bot]]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage :thumbsup:

Coverage data is based on head (5a2254c) compared to base (16d2ccb). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #87 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 38 39 +1 Lines 731 752 +21 ========================================= + Hits 731 752 +21 ``` | [Impacted Files](https://codecov.io/gh/JetBrains-Research/CFPQ_Data/pull/87?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JetBrains-Research) | Coverage Δ | | |---|---|---| | [cfpq\_data/graphs/utils/\_\_init\_\_.py](https://codecov.io/gh/JetBrains-Research/CFPQ_Data/pull/87/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JetBrains-Research#diff-Y2ZwcV9kYXRhL2dyYXBocy91dGlscy9fX2luaXRfXy5weQ==) | `100.00% <100.00%> (ø)` | | | [cfpq\_data/graphs/utils/add\_reverse\_edges.py](https://codecov.io/gh/JetBrains-Research/CFPQ_Data/pull/87/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JetBrains-Research#diff-Y2ZwcV9kYXRhL2dyYXBocy91dGlscy9hZGRfcmV2ZXJzZV9lZGdlcy5weQ==) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JetBrains-Research). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JetBrains-Research)

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