Revert changes in KelvinTests and RankineTests

Reverted namespace, using directive, and data type changes in
KelvinTests and RankineTests classes to their original state.

Author: dtanglr

test/Primitively.IntegrationTests/NumericTests/Double/KelvinTests.cs

@@ -1,8 +1,8 @@
-using Acme.TestLib2.Single;
+using Acme.TestLib2.Double;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Single;
+namespace Primitively.IntegrationTests.NumericTests.Double;
 
 public class KelvinTests
 {
@@ -67,9 +67,9 @@ public void Minimum_Sut_Scale_Converts_To_Minimum_In_Other_Scales()
         var kelvin = new Kelvin(Kelvin.Minimum);
 
         // Act
-        float celsius = (Celsius)kelvin;
-        float fahrenheit = (Fahrenheit)kelvin;
-        float rankine = (Rankine)kelvin;
+        double celsius = (Celsius)kelvin;
+        double fahrenheit = (Fahrenheit)kelvin;
+        double rankine = (Rankine)kelvin;
 
         // Assert
         celsius.Should().Be(Celsius.Minimum);

test/Primitively.IntegrationTests/NumericTests/Double/RankineTests.cs

@@ -1,8 +1,8 @@
-using Acme.TestLib2.Single;
+using Acme.TestLib2.Double;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Single;
+namespace Primitively.IntegrationTests.NumericTests.Double;
 
 public class RankineTests
 {
@@ -67,9 +67,9 @@ public void Minimum_Sut_Scale_Converts_To_Minimum_In_Other_Scales()
         var rankine = new Rankine(Rankine.Minimum);
 
         // Act
-        float celsius = (Celsius)rankine;
-        float fahrenheit = (Fahrenheit)rankine;
-        float kelvin = (Kelvin)rankine;
+        double celsius = (Celsius)rankine;
+        double fahrenheit = (Fahrenheit)rankine;
+        double kelvin = (Kelvin)rankine;
 
         // Assert
         celsius.Should().Be(Celsius.Minimum);

test/Primitively.IntegrationTests/NumericTests/Single/KelvinTests.cs

@@ -1,8 +1,8 @@
-using Acme.TestLib2.Double;
+using Acme.TestLib2.Single;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Double;
+namespace Primitively.IntegrationTests.NumericTests.Single;
 
 public class KelvinTests
 {

test/Primitively.IntegrationTests/NumericTests/Single/RankineTests.cs

@@ -1,8 +1,8 @@
-using Acme.TestLib2.Double;
+using Acme.TestLib2.Single;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Double;
+namespace Primitively.IntegrationTests.NumericTests.Single;
 
 public class RankineTests
 {