test: ensure test values are deterministic

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---

Author: kgryte

lib/node_modules/@stdlib/stats/incr/mpcorr2/test/test.js

@@ -346,7 +346,7 @@ tape( 'the accumulator function computes a moving squared sample Pearson product
 
 	N = 10;
 	M = 100;
-	data = datasets( N, M, randu.seed );
+	data = datasets( N, M, 123456 );
 
 	// Define the window size:
 	W = 10;
@@ -395,7 +395,7 @@ tape( 'the accumulator function computes a moving squared sample Pearson product
 
 	N = 10;
 	M = 100;
-	data = datasets( N, M, randu.seed );
+	data = datasets( N, M, 123456 );
 
 	// Define the window size:
 	W = 10;