Removed thread-segregation from Variable and let.

[ashleyfrieze]

Fixes #115 and supersedes #117. This removes (for now) the artificial thread-separate introduced with the Variable class and let hook added in release 1.1.0.

I will work out how to make parallel execution thread safe in its own PR.

[codecov]

Codecov Report

Merging #118 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master    #118      +/-   ##
===========================================
- Coverage      99.3%   99.3%   -0.01%     
- Complexity      332     333       +1     
===========================================
  Files            40      40              
  Lines           717     716       -1     
  Branches         22      22              
===========================================
- Hits            712     711       -1     
  Partials          5       5

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/com/greghaskins/spectrum/Variable.java	100% <100%> (ø)	4 <2> (+1)	⬆️

[greghaskins]

@ashleyfrieze looks great. +1 for the tests too. I'll merge and push a new version by tomorrow.

[ashleyfrieze]

I think you know me well enough to know I'm a test first guy :)

What kind of test framework would not have tests for discovered bugs in boundary conditions!!!?

This is going to make parallel tests much harder to implement.

[ashleyfrieze]

By the way, coverage is down because there is less code rather than less coverage.