update tests and precompile

[bjarthur]

exchanged FactCheck for Base.Test to remove a dependency.

and turned on precompilation. it's a small package, but is there any reason not to?

[codecov-io]

Codecov Report

Merging #14 into master will decrease coverage by 2.81%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
- Coverage    33.8%   30.98%   -2.82%     
==========================================
  Files           6        6              
  Lines          71       71              
==========================================
- Hits           24       22       -2     
- Misses         47       49       +2

Impacted Files	Coverage Δ
src/Measures.jl	0% <ø> (ø)	⬆️
src/operations.jl	50% <0%> (-7.15%)	⬇️
src/length.jl	64.7% <0%> (-5.89%)	⬇️

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[tlnagy]

Any idea why codecov doesn't like this PR?

[bjarthur]

well it's either that coverage is already a miserable ~30% or that for some reason it decreased by 2%. either way, i think fixing that is a separate issue. might not be worth doing at all if long-term we're considering switching to unitful.jl.

[shashi]

Thanks @bjarthur!