William Fisher

Switches from facebookgo/clock to benbjohnson/clock

1

This PR switches from the facebookgo/clock dependency to benbjohnson/clock which is the more actively maintained drop-in replacement. It also initializes the module using `go mody init`.

Parse error when building module on FreeBSD

2

When building `thyme` on FreeBSD using `stack`, I get the following error: ``` Configuring thyme-0.3.5.5... Building thyme-0.3.5.5... Preprocessing library thyme-0.3.5.5... [ 1 of 20] Compiling Data.Thyme.Format.Internal ( src/Data/Thyme/Format/Internal.hs, .stack-work/dist/x86_64-freebsd/Cabal-1.24.2.0/build/Data/Thyme/Format/Internal.o )...