Consider using faster time formatting

[chshersh]

There're benchmarks in chronos library regarding time pretty printing:

• Add benchmarks for pretty-print byteverse/chronos#24

katip logging library also has fast implementation of time formatting:

• https://github.com/Soostone/katip/blob/e04f087f5058f815b37b6a9b2ceafb366e45eec2/katip/src/Katip/Format/Time.hs

[chshersh]

You can see benchmarks results in chronos library:

• [#22] Add benchmark results to README byteverse/chronos#26

It seems that chronos is the fastest library. I also launched benchmarks for katip locally and looks like katip has approximately the same performance as chronos. So if we want fastest time formatting, it's easier to depend on chronos and use time formatting from this library.