Memory leak in ActionCatalog.Add()

[jdeisenh]

Describe the bug
After running for two days, our project using moleculer-go crashes with an OOM error

To Reproduce
Any setup with some Actions published should show this problem under profiling

Expected behavior
Memory usage limited over time

Additional context
Profiled to be leaking in ActionCatalog) Add, append()
Logging shows the ActionEntry List grows with every ActionCatalog update
An attempted fix exist which will replace entries instead of just adding them, which seems to work.

[jdeisenh]

Same thing in EventCatalog().Add(). List keeps growing