Update version on branch `main`

[ClaudiaComito]

Due Diligence

• General:
  • [x] title of the PR is suitable to appear in the Release Notes
• Implementation:
  • [ ] unit tests: all split configurations tested
  • [ ] unit tests: multiple dtypes tested
  • [ ] benchmarks: created for new functionality
  • [ ] benchmarks: performance improved or maintained
  • [ ] documentation updated where needed

Description

Issue/s resolved: #1718

Changes proposed:

• Version bumped to 1.6.0-dev on main development branch

Type of change

Memory requirements

Performance

Does this change modify the behaviour of other functions? If so, which?

yes / no

[github-actions[bot]]

Thank you for the PR!

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.14%. Comparing base (ee1d95c) to head (eb7ba5f). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1719 +/- ## ======================================= Coverage 92.14% 92.14% ======================================= Files 83 83 Lines 12209 12209 ======================================= Hits 11250 11250 Misses 959 959 ``` | [Flag](https://app.codecov.io/gh/helmholtz-analytics/heat/pull/1719/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=helmholtz-analytics) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/helmholtz-analytics/heat/pull/1719/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=helmholtz-analytics) | `92.14% <100.00%> (ø)` | | 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=helmholtz-analytics#carryforward-flags-in-the-pull-request-comment) to find out more.

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