LA: update tests to modified optional signatures

src/UnitTests/LinearAlgebraTests/Complex/Solvers/StopCriterium/DivergenceStopCriteriumTest.cs

@@ -59,7 +59,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex.Solvers.StopCrit
         [Test]
         public void CreateWithIllegalMinimumIterationsThrowsArgumentOutOfRangeException()
         {
-            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(2));
+            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(minimumIterations: 2));
         }
 
         /// <summary>

src/UnitTests/LinearAlgebraTests/Complex32/Solvers/StopCriterium/DivergenceStopCriteriumTest.cs

@@ -59,7 +59,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Complex32.Solvers.StopCr
         [Test]
         public void CreateWithIllegalMinimumIterationsThrowsArgumentOutOfRangeException()
         {
-            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(2));
+            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(minimumIterations: 2));
         }
 
         /// <summary>

src/UnitTests/LinearAlgebraTests/Double/Solvers/StopCriterium/DivergenceStopCriteriumTest.cs

@@ -57,7 +57,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Double.Solvers.StopCrite
         [Test]
         public void CreateWithIllegalMinimumIterationsThrowsArgumentOutOfRangeException()
         {
-            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(2));
+            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(minimumIterations: 2));
         }
 
         /// <summary>

src/UnitTests/LinearAlgebraTests/Single/Solvers/StopCriterium/DivergenceStopCriteriumTest.cs

@@ -57,7 +57,7 @@ namespace MathNet.Numerics.UnitTests.LinearAlgebraTests.Single.Solvers.StopCrite
         [Test]
         public void CreateWithIllegalMinimumIterationsThrowsArgumentOutOfRangeException()
         {
-            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(2));
+            Assert.Throws<ArgumentOutOfRangeException>(() => new DivergenceStopCriterium(minimumIterations: 2));
         }
 
         /// <summary>