Fix 'in' (#458)

src/libraries/Microsoft.PowerFx.Interpreter/Functions/LibraryOperators.cs

@@ -419,7 +419,7 @@ namespace Microsoft.PowerFx.Functions
 
                         if (!exact && rhs is StringValue strRhs)
                         {
-                            right = strRhs.ToLower();
+                            rhs = strRhs.ToLower();
                         }
 
                         if (RuntimeHelpers.AreEqual(left, rhs))

src/libraries/Microsoft.PowerFx.Interpreter/Microsoft.PowerFx.Interpreter.csproj

@@ -35,7 +35,6 @@
     <PackageReference Include="System.Text.Json" Version="5.0.2" />
     <PackageReference Include="System.Collections.Immutable" Version="5.0.0" />
     <PackageReference Include="System.Memory" Version="4.5.4" />
-    <PackageReference Include="Microsoft.PowerFx.Core" Condition=" '$(ReleasePackageVersion)' == '' " Version="$(LocalPackageVersion)" />
   </ItemGroup>
 
   <ItemGroup>

src/tests/Microsoft.PowerFx.Core.Tests/ExpressionTestCases/inScalar.txt

@@ -82,3 +82,27 @@ true
 
 >> "'" in "SQL literal '"
 true
+
+>> "Jane" in ["Jane", "John"]
+true
+
+>> "John" in ["Jane", "John"]
+true
+
+>> "JANE" in ["Jane", "John"]
+true
+
+>> "jOHN" in ["Jane", "John"]
+true
+
+>> "Jane" exactin ["Jane", "John"]
+true
+
+>> "John" exactin ["Jane", "John"]
+true
+
+>> "JANE" exactin ["Jane", "John"]
+false
+
+>> "jOHN" exactin ["Jane", "John"]
+false