Support parsing measurement with decimal uncertainty

[giordano]

Fix #44. @alusiani Could you please check that I got it correctly? Thanks!

[codecov-io]

Codecov Report

Merging #45 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage    96.3%   96.31%   +<.01%     
==========================================
  Files          12       12              
  Lines         542      543       +1     
==========================================
+ Hits          522      523       +1     
  Misses         20       20

Impacted Files	Coverage Δ
src/parsing.jl	100% <100%> (ø)	⬆️

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[alusiani]

Fix #44. @alusiani Could you please check that I got it correctly? Thanks!
Thanks! The modification works fine! The branch Measurements#decimal-error now correctly parses results with decimal errors as I saw reported in Particle Physics paper.

[giordano]

Great, thanks for checking