Add Aqua.jl tests

[adrhill]

Closes #124.

[codecov]

Codecov Report

Merging #125 (057036e) into master (cfa6262) will increase coverage by 0.89%.
Report is 4 commits behind head on master.
The diff coverage is 88.84%.

❗ Current head 057036e differs from pull request most recent head 8bbe7de. Consider uploading reports for the commit 8bbe7de to get more accurate results

@@            Coverage Diff             @@
##           master     #125      +/-   ##
==========================================
+ Coverage   92.29%   93.18%   +0.89%     
==========================================
  Files          17       18       +1     
  Lines         558      646      +88     
==========================================
+ Hits          515      602      +87     
- Misses         43       44       +1     

Files Changed	Coverage Δ
src/ExplainableAI.jl	100.00% <ø> (ø)
src/analyze_api.jl	100.00% <ø> (ø)
src/lrp/composite_presets.jl	100.00% <ø> (ø)
src/lrp/checks.jl	80.00% <73.33%> (+33.84%)	⬆️
src/flux_chain_utils.jl	82.95% <82.95%> (ø)
src/flux_layer_utils.jl	86.66% <86.66%> (ø)
src/lrp/rules.jl	93.19% <87.50%> (-2.67%)	⬇️
src/lrp/lrp.jl	96.42% <94.44%> (-3.58%)	⬇️
src/lrp/show.jl	97.80% <95.83%> (-2.20%)	⬇️
src/lrp/canonize.jl	96.42% <100.00%> (-0.13%)	⬇️
... and 1 more