Bump rand from 0.8 to 0.9

[Dirreke]

Close#397

[codecov]

Codecov Report

❌ Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.95%. Comparing base (c7ff9dc) to head (9322664).
⚠️ Report is 26 commits behind head on master.

Files with missing lines	Patch %	Lines
ndarray-linalg/src/generate.rs	20.00%	4 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #400 +/- ##
==========================================
+ Coverage 86.92% 86.95% +0.02% 
==========================================
Files 64 64 Lines 3649 3649 ==========================================
+ Hits 3172 3173 +1 + Misses 477 476 -1 

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