Ppinot4py

What's Changed
* User can now specify time unit in TimeMeasure
* Added rolling window grouping
* Supports recent versions of pandas


**Full Changelog**: https://github.com/isa-group/ppinot4py/compare/v1.2...v1.2.1

What's Changed
* Supports business hours and holidays when computing time measures
* Allows defining instant conditions based on activities or the process instance
* Improves the documentation in the README


**Full Changelog**: https://github.com/isa-group/ppinot4py/compare/v1.1.4...v1.2

It fixes problems with group by in AggregatedMeasures. It also fixes problems with DataMeasures without preconditions, which are necessary to compute group by.

This new release just adds the ability to render a linguistic pattern-based string for each metric based on [Using templates and linguistic patterns to define process performance indicators. Enterp. Inf. Syst. 10(2): 159-192 (2016)](https://doi.org/10.1080/17517575.2013.867543)


v_02
Structure changes and renaming, everything more intuitive and accesible