Pywgraph

This minor updat just improves the README.md file

**Full Changelog**: https://github.com/josek98/pywgraph/compare/v0.2.0...v0.2.1

The weights have been simplify so now they only consists of a float. In future versions the aim is to be able so that the weight can be any object with a binary operation with inverse.

For the graph class, now graphs are comparable and can be instantiate with the new `from_dict` method.

What's Changed
* Develop by josek98 in https://github.com/josek98/pywgraph/pull/4
* Develop by josek98 in https://github.com/josek98/pywgraph/pull/5
* update pytest.yml by josek98 in https://github.com/josek98/pywgraph/pull/6


**Full Changelog**: https://github.com/josek98/pywgraph/compare/v0.1.0...v0.2.0

**Full Changelog**: https://github.com/josek98/pywgraph/compare/v0.2.0...v0.2.0

Release of the pywgraph library to manage weighted directed graphs in python. Currently still working on adding features like searching for paths in the graph.

What's Changed
* Develop by josek98 in https://github.com/josek98/pywgraph/pull/1
* Enforce DirectedEdge so that start and end must be different. Add Nod… by josek98 in https://github.com/josek98/pywgraph/pull/2

New Contributors
* josek98 made their first contribution in https://github.com/josek98/pywgraph/pull/1

**Full Changelog**: https://github.com/josek98/pywgraph/commits/v0.1.0