Fix class injector abstract method handling (#134)

* Fix class injector abstract method handling to support newer unity versions where Il2CppParameterInfo doesn't exist.

* Remove parameter name check and add return type check

---------

Co-authored-by: Jeremy Pritts <49847914+ds5678@users.noreply.github.com>

Author: WNP78

Il2CppInterop.Runtime/Injection/ClassInjector.cs

@@ -359,14 +359,13 @@ static void FindAbstractMethods(List<INativeMethodInfoStruct> list, INativeClass
                         {
                             if (Marshal.PtrToStringAnsi(m.Name) != name) return false;
                             if (m.ParametersCount != baseMethod.ParametersCount) return false;
+                            if (GetIl2CppTypeFullName(m.ReturnType) != GetIl2CppTypeFullName(baseMethod.ReturnType)) return false;
 
                             for (var i = 0; i < m.ParametersCount; i++)
                             {
                                 var parameterInfo = UnityVersionHandler.Wrap(baseMethod.Parameters, i);
                                 var otherParameterInfo = UnityVersionHandler.Wrap(m.Parameters, i);
 
-                                if (Marshal.PtrToStringAnsi(parameterInfo.Name) != Marshal.PtrToStringAnsi(otherParameterInfo.Name)) return false;
-
                                 if (GetIl2CppTypeFullName(parameterInfo.ParameterType) != GetIl2CppTypeFullName(otherParameterInfo.ParameterType)) return false;
                             }