Fix infinite loop for unary operator opcodes

[puff]

UnaryOperatorHandlerBase does not increase the ProgramCounter so it will never progress past the current instruction.

var module = ModuleDefinition.FromModule(typeof(UnaryOperatorTestClass).Module);
var method = module.GetAllTypes().FirstOrDefault(x => x.Name == "UnaryOperatorTestClass")?.Methods.FirstOrDefault(x => x.Name == "UnaryOperatorTest");

var vm = new CilVirtualMachine(module, false);
vm.Call(method!, Array.Empty<BitVector>());
public static class UnaryOperatorTestClass
{
    public static bool UnaryOperatorTest()
    {
        var one = 1;
        var negated = -one;
        return negated == -1;
    }
}

Executing this will continuously execute the negate instruction and never progress past it.
To fix this, I just switched UnaryOperatorHandlerBase to implement FallThroughOpCodeHandler

[Washi1337]

Good catch. Thanks!