Kiutils

What's Changed
* Feature: Migrated test framework to Python `unittest` by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/21
* Fix: Make use of absolute imports by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/24
* Fix: Basic schematic tests and `Schematic().to_sexpr()` structure by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/26
* Fix: Correct initial values of `Property()` class by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/27
* Fix: Footprint attributes missing when certain "Manufacturing Attributes" are selected by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/28
* Feature: Documentation via Sphinx on readthedocs.io by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/29
* Feature: Support for older Python versions by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/30

For further information see CHANGELOG.md

**Full Changelog**: https://github.com/mvnmgrx/kiutils/compare/v1.1.3...v1.1.4

What's Changed
* Fix: Additional layers in stackup not parsed by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/18


**Full Changelog**: https://github.com/mvnmgrx/kiutils/compare/v1.1.2...v1.1.3

This release features the following:

* Feature: Track arc support by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/13
* Fix: Redundant line break in a footprint's pad section by mvnmgrx in https://github.com/mvnmgrx/kiutils/pull/16


**Full Changelog**: https://github.com/mvnmgrx/kiutils/compare/v1.1.1...v1.1.2

This release features the following:

- Added: Support for custom design rules (`.kicad_dru`)
- Added: Support for custom worksheets (`.kicad_wks`)

This release features the following:
- Added: Support for Python Package Index (PyPI)
- Changed: Source directory for development moved from `kiutils/` to `src/kiutils/`

This release features the following:
- Added: Dimension, DimensionStyle, DimensionFormat classes for dimensions (measurements in PCB)
- Added: Target class for board target markers
- Added: Support for dimensions and target markers in Board class
- Added: Prerequisites in docu
- Fixed: Correct parsing of footprints with empty `attr` field (see 2)
- Fixed: Quoted strings funcion now handles integers that may be parsed from older KiCad versions
correctly (see 3)
- Fixed: Symbol pin's `alternate` field was missing and is now parsed correctly (see 4)
- Fixed: Footprint `libraryLink` attribute was missing (see 5)