ServiceProvider: Use std::string as key for services map

This fixes potantial crash that can happen on certain platforms like
macOS due to `typeid(T).name()` returning different pointers to string
which does not happen on all platforms.

src/Base/ServiceProvider.h

@@ -157,7 +157,7 @@ public:
     }
 
 private:
-    std::map<const char*, std::deque<ServiceDescriptor>> _implementations;
+    std::map<std::string, std::deque<ServiceDescriptor>> _implementations;
 };
 
 BaseExport extern ServiceProvider globalServiceProvider;