Fix Eig for column-major arrays with real elements

[jturner314]

This fixes Eig for column-major arrays with real elements. (The previous implementation returned the conjugate of the correct eigenvectors.) It also fixes the tests to correctly test column-major arrays (the previous implementation never tested column-major arrays due to bugs in the tests) and ignore the order of the eigenvalues.

[codecov]

Codecov Report

Merging #298 (d944821) into master (082f01d) will increase coverage by 0.26%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #298      +/-   ##
==========================================
+ Coverage   89.01%   89.28%   +0.26%     
==========================================
  Files          71       71              
  Lines        3578     3592      +14     
==========================================
+ Hits         3185     3207      +22     
+ Misses        393      385       -8     

Impacted Files	Coverage Δ
lax/src/eig.rs	97.00% <100.00%> (+8.00%)	⬆️
ndarray-linalg/tests/eig.rs	100.00% <100.00%> (ø)

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