Bidimensional

This pull request implements the new advanced.spline module, which allows the user to generate a 2D spline.

What's Changed
* Spline implementation by erlete in https://github.com/erlete/bidimensional/pull/25

**Full Changelog**: https://github.com/erlete/bidimensional/compare/v1.6.7...v1.6.8

Fixed package release issue that caused the version update to fail.

What's Changed
* Update structure and add methods by erlete in https://github.com/erlete/bidimensional/pull/17

**Full Changelog**: https://github.com/erlete/bidimensional/compare/v1.6.5...v1.6.7

Fixed import statements to turn them into relative imports.

Updated attribute settings on the polygons.triangle module.

Added more useful methods for triangle manipulation.

What's Changed
* Update structure and add methods by erlete in https://github.com/erlete/bidimensional/pull/17

**Full Changelog**: https://github.com/erlete/bidimensional/compare/v1.6.5...v1.6.6

Updated the package structure in order to support flexible import statements.

Also added a few methods such as operations.area and polygons.Triangle magic methods for operator compatibility.

What's Changed
* Update branch by erlete in https://github.com/erlete/bidimensional/pull/15
* Update package structure and add new features by erlete in https://github.com/erlete/bidimensional/pull/16

**Full Changelog**: https://github.com/erlete/bidimensional/compare/v1.6.4...v1.6.5

This release features some minor workflow fixes.

**Full Changelog**: https://github.com/erlete/bidimensional/compare/v1.6.3...v1.6.4

This release features some minor permission fixes.

**Full Changelog**: https://github.com/erlete/bidimensional/compare/v1.6.2...v1.6.3