Fixed two minor bugs

[skairunner]

Bug: Ray3-Sphere intersect tests had the exact same result as Line3-Sphere intersects. QoL: Comparing any geometric shape with None now returns False

[codecov-io]

Codecov Report

Merging #14 into master will decrease coverage by 0.01%. The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
- Coverage   54.67%   54.66%   -0.02%     
==========================================
  Files           1        1              
  Lines        1635     1639       +4     
==========================================
+ Hits          894      896       +2     
- Misses        741      743       +2

Impacted Files	Coverage Δ
euclid.py	54.66% <33.33%> (-0.02%)	:arrow_down:

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