Add random prime seeding

[mhostetter]

In [1]: import galois

In [2]: galois.random_prime(10, seed=1)
Out[2]: 1153

In [3]: galois.random_prime(10, seed=1)
Out[3]: 1153

[codecov]

Codecov Report

Base: 95.54% // Head: 95.52% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (a4954b9) compared to base (0341cda).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #409      +/-   ##
==========================================
- Coverage   95.54%   95.52%   -0.02%     
==========================================
  Files          42       42              
  Lines        5455     5436      -19     
==========================================
- Hits         5212     5193      -19     
  Misses        243      243              

Impacted Files	Coverage Δ
src/galois/_codes/_bch.py	98.12% <100.00%> (-0.01%)	⬇️
src/galois/_codes/_cyclic.py	100.00% <100.00%> (ø)
src/galois/_codes/_linear.py	92.59% <100.00%> (-0.27%)	⬇️
src/galois/_codes/_reed_solomon.py	98.26% <100.00%> (-0.01%)	⬇️
src/galois/_domains/_array.py	96.68% <100.00%> (-0.03%)	⬇️
src/galois/_fields/_array.py	98.89% <100.00%> (-0.01%)	⬇️
src/galois/_fields/_factory.py	96.49% <100.00%> (-0.04%)	⬇️
src/galois/_fields/_gf2.py	100.00% <100.00%> (ø)
src/galois/_fields/_primitive_element.py	92.00% <100.00%> (-0.11%)	⬇️
src/galois/_helper.py	100.00% <100.00%> (ø)
... and 11 more

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