Timekeeping not abstracted

[ewth]

I feel like timekeeping should be abstracted out of the sorting classes. This feels like a separate responsibility; conceptually though, creating an entire overarching system to time sorting runs might be overkill. Requires some thought.

sorting-algorithms/src/Sort/MergeSort.php

Line 20 in 035bf33

$timeStarted = microtime(true);

[ewth]

Time keeping moved into its own class for that specific purpose. It's fairly rough but it's only intended to be indicative for demonstration purposes.