* Upgraded to JUnit5
* Enhanced the tests for multiple instances of graphs
* Save/Load test now pass
* Changed the hierarchy of classes:
- Graph is now the main Abstract class for the graphs
- GraphDirected is an Abstract class for directed graph and inherits Graph
- GraphUndirected is an Abstract class for undirected graph and inherits Graph
* Changed how the Weight is represented in the graphs, removing the second parameter. From now on is only int.
* Updated the implementations for MatrixGraph, ListGraph and MapGraph
* Implemented only one undirected graph MatrixUndGraph
* Added UnionFind and one implementation: QuickFind
* Added MSF visit and implemented Kruskal and Prim (no tests)
* Changed all the graphic components due to the deletion of the second parameter in the Graph class
Giacomo Bertolazzi
9bda59dc7b