Fixing unit tests build

Tests/GeometriaAlgorithmsTests/TestUtils/MersenneTwister+Geometria.swift

@@ -0,0 +1,15 @@
+import Geometria
+
+extension MersenneTwister {
+    func randomScalar(range: ClosedRange<Double>) -> Double {
+        var random = self
+
+        return Double.random(in: range, using: &random)
+    }
+
+    func randomVectors(count: Int, _ scalarGen: (MersenneTwister) -> Double) -> [Vector2D] {
+        return (0..<count).map { _ in
+            return .init(x: scalarGen(self), y: scalarGen(self))
+        }
+    }
+}