feat: type check input array

[chrispahm]

Check if every element in input array is numeric, fixes #148

[codecov]

Codecov Report

Merging #149 (4a38bc5) into main (7a593b5) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #149      +/-   ##
==========================================
+ Coverage   66.62%   66.67%   +0.05%     
==========================================
  Files          32       32              
  Lines        3227     3232       +5     
  Branches      513      514       +1     
==========================================
+ Hits         2150     2155       +5     
  Misses        997      997              
  Partials       80       80              

Impacted Files	Coverage Δ
src/matrix.js	76.97% <100.00%> (+0.10%)	⬆️

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[stropitek]

Thank you for the PR!

Could you:

• Add a test which initializes a matrix with non-numeric values and verifies that it throws an error
• Run npm run prettier-write to fix the failing test

[stropitek]

LGTM