Revision history for Algorithm-Graphs-TransitiveClosure-Tiny

1.00    2022/01/16
        - The second argument is now optional and has a different meaning.
        - Empty subhashes are removed by default.
        - The keys (vertices) no longer have to be integers, any strings can be used.
        - Adapted POD.

0.03    2022/01/14
        Added test, corrected typos in POD.

0.02    2022/01/14
        Improved POD.

0.01    2022/01/13
        First version, released on an unsuspecting world.