Fix the Windows build by not storing Unicode in std::string

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

tests/Encodings/Encodings.Tests.cs

@@ -7,14 +7,14 @@ public class EncodingsTests : GeneratorTestFixture
     [Test]
     public void TestFoo()
     {
-        const string georgia = "საქართველო";
-        Foo.Unicode = georgia;
-        Assert.That(Foo.Unicode, Is.EqualTo(georgia));
-
-        // TODO: move this, it has nothing to do with Unicode, it's here only not to break the CLI branch
         using (var foo = new Foo())
         {
+            const string georgia = "საქართველო";
+            foo.Unicode = georgia;
+            Assert.That(foo.Unicode, Is.EqualTo(georgia));
+
+            // TODO: move this, it has nothing to do with Unicode, it's here only not to break the CLI branch
             Assert.That(foo[0], Is.EqualTo(5));
         }
     }
-}
+}

tests/Encodings/Encodings.cpp

@@ -1,6 +1,6 @@
 #include "Encodings.h"
 
-std::string Foo::Unicode = "";
+std::string Foo::StringVariable = "";
 
 Foo::Foo()
 {

tests/Encodings/Encodings.h

@@ -7,7 +7,8 @@ public:
     Foo();
     ~Foo();
 
-    static std::string Unicode;
+    const char* Unicode;
+    static std::string StringVariable;
 
 	// TODO: VC++ does not support char16
 	// char16 chr16;