More type work

src/Numerics/GaussianDistribution.php

@@ -12,11 +12,11 @@ class GaussianDistribution implements \Stringable
 {
     // precision and precisionMean are used because they make multiplying and dividing simpler
     // (the the accompanying math paper for more details)
-    private $precision;
+    private float $precision;
 
-    private $precisionMean;
+    private float $precisionMean;
 
-    private $variance;
+    private float $variance;
 
     public function __construct(private float $mean = 0.0, private float $standardDeviation = 1.0)
     {

src/Numerics/Range.php

@@ -26,7 +26,7 @@ class Range
         return $this->max;
     }
 
-    protected static function create(int $min, int $max): self
+    protected static function create(int $min, int $max): static
     {
         return new Range($min, $max);
     }

src/Numerics/SquareMatrix.php

@@ -4,7 +4,7 @@ namespace DNW\Skills\Numerics;
 
 class SquareMatrix extends Matrix
 {
-    public function __construct(...$allValues)
+    public function __construct(float|int ...$allValues)
     {
         $rows = (int) sqrt(count($allValues));
         $cols = $rows;