Plugins compile as .lib files instead of .dll files


I’m trying to compile a plugin with the UE4 engine, but the output is in .lib.
Before that the output was .dll files, but I can’t figure out why this has changed and where to change it back.

Here is the modules key in the uplugin file:

"Modules": [
		"Name": "TestPlugin",
		"Type": "Runtime",
		"LoadingPhase": "Default",
		"WhitelistPlatforms": [