Relax change rules

[codecov[bot]]

Codecov Report

Patch coverage: 66.66% and project coverage change: -0.37% :warning:

Comparison is base (06ec97f) 92.69% compared to head (ee096c6) 92.32%. Report is 1 commits behind head on dev.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #15 +/- ## ========================================== - Coverage 92.69% 92.32% -0.37% ========================================== Files 6 6 Lines 438 443 +5 ========================================== + Hits 406 409 +3 - Misses 32 34 +2 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `92.32% <66.66%> (-0.37%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=biosimulators#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/biosimulators/Biosimulators_tellurium/pull/15?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=biosimulators) | Coverage Δ | | |---|---|---| | [biosimulators\_tellurium/core.py](https://app.codecov.io/gh/biosimulators/Biosimulators_tellurium/pull/15?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=biosimulators#diff-Ymlvc2ltdWxhdG9yc190ZWxsdXJpdW0vY29yZS5weQ==) | `91.21% <66.66%> (-0.41%)` | :arrow_down: |

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