Tstoolbox

Feat

- Added the capability of using the index (usually datetimeindex) as
a `x_train_cols` in the regression.
fix: Now detect is DataFrame or Series and skip further processing in
'read_iso_ts'
- Added "min_count" keyword to `aggregate`
docs: Misc.
build: Added "extra_requires" to setup.py for development

Feat

- New read from xlsx, wdm files.
- rework new multiple sources read feature.
- Continue type hint tests.

Refactor

- read_iso_ts is now part of common_kwds.

Fix

- Minor fixes.
- Docs, fixes because of changed memory_optimize
- memory_optimize is less aggressive
- read --columns filters output.

Feat

- "Typical" to coerce args/kwargs.
- added butterworth filter

Fix

- Fixed months_across_years.

Fix

- Matched Paul Tor's color order.
- Needed matplotlib styles in MANIFEST.in.

Fix

- Incorporated SciencePlots mpl styles.