Extend tests

[JanJereczek]

This PR ignores the files that are irrelevant for code coverage and adds new tests for:

• kolmogorov_smirnov and permutation_entropy
• the methods for significance testing that are implemented in src/significance/basic_stat_significance.jl
• RidgeRegressionSlope (previous version was broken and more intricate)
• a full analysis using SegmentedWindowConfig
• the (already existing) tests for timeseries.jl were included in the test suite. These functions are not used so far but they will be as soon as we deal with unevenly sampled timeseries!

For these tests to pass, minor changes have been made:

• include ComplexityMeasure.jl in Project.toml, which is needed for permutation_entropy. I even reexport it, since many functions of this software are usable as metrics for TransitionsInTimeseries.jl.
• add nameof(metric::RidgeRegressionSlope). This fixes the display of IndicatorsChangeResults.

Finally, I added a few TODO flags and will open corresponding issues :)

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (b1d3387) 36.42% compared to head (7be5c96) 83.94%.

Files	Patch %	Lines
src/change_metrics/slope.jl	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #75 +/- ## =========================================== + Coverage 36.42% 83.94% +47.51% =========================================== Files 18 15 -3 Lines 442 355 -87 =========================================== + Hits 161 298 +137 + Misses 281 57 -224 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[Datseris]

• include ComplexityMeasure.jl in Project.toml, which is needed for permutation_entropy. I even reexport it, since many functions of this software are usable as metrics for TransitionsInTimeseries.jl.

Let's remove permutation_entropy from the source code and remove the export and remove the dependency. The Logistic map example already shows how to use ComplexityMeasures.jl to compute the permutation entropy.

[JanJereczek]

I agree! It's done and ready for merge :)

[Datseris]

did you remove it also from the @docs block?