Add boundary for bezier curve

[HaoxuanGuo]

Bezier curve for #210 .

[codecov]

Codecov Report

Merging #223 (1dc8754) into master (ff1f465) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

❗ Current head 1dc8754 differs from pull request most recent head e66b6f9. Consider uploading reports for the commit e66b6f9 to get more accurate results

@@            Coverage Diff             @@
##           master     #223      +/-   ##
==========================================
- Coverage   88.57%   88.49%   -0.09%     
==========================================
  Files         103      103              
  Lines        2583     2608      +25     
==========================================
+ Hits         2288     2308      +20     
- Misses        295      300       +5     

Impacted Files	Coverage Δ
src/primitives/bezier.jl	97.50% <100.00%> (+0.35%)	⬆️
src/primitives/cylinder.jl	70.58% <0.00%> (-15.13%)	⬇️
src/primitives/plane.jl	89.47% <0.00%> (+0.58%)	⬆️

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