Move away from deprecated LightGraphs to Graphs

[rejuvyesh]

See https://github.com/JuliaGraphs/Graphs.jl#transition-from-lightgraphs-to-graphs

[codecov-commenter]

Codecov Report

Merging #20 (91aea6c) into main (ad046e5) will decrease coverage by 0.16%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #20      +/-   ##
==========================================
- Coverage   92.48%   92.31%   -0.17%     
==========================================
  Files          81       81              
  Lines        4005     3761     -244     
==========================================
- Hits         3704     3472     -232     
+ Misses        301      289      -12     

Impacted Files	Coverage Δ
src/Dojo.jl	100.00% <ø> (ø)
src/graph/system.jl	98.03% <100.00%> (-0.24%)	⬇️
src/graph/entry.jl	75.00% <0.00%> (-12.50%)	⬇️
src/contacts/utilities.jl	40.00% <0.00%> (-5.46%)	⬇️
src/orientation/quaternion.jl	82.92% <0.00%> (-5.41%)	⬇️
src/orientation/mapping.jl	36.36% <0.00%> (-5.31%)	⬇️
src/joints/rotational/input.jl	42.10% <0.00%> (-1.49%)	⬇️
src/joints/joint.jl	88.88% <0.00%> (-0.51%)	⬇️
src/contacts/impact.jl	86.20% <0.00%> (-0.46%)	⬇️
src/bodies/set.jl	94.54% <0.00%> (-0.37%)	⬇️
... and 46 more

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