Make pluginloader use importlib instead imp

Python 3.12 has removed imp and it's recommended to use importlib
instead. Python 2.7 doesn't have importlib, so Python 2.7 support is
ceased (not a big deal since it's been more than 3 years since it was
EOLed) as a part of this change.

pluginloader/__init__.py

@@ -1,5 +1,6 @@
 import os
-import imp
+import importlib.machinery
+import importlib.util
 PluginFolder = os.path.join(os.path.dirname(os.path.realpath(__file__)),"..","plugins")
 MainModule = "__init__"
 
@@ -11,9 +12,12 @@ def get_plugin(name, plugin_path):
         location = os.path.join(dir, name)
         if not os.path.isdir(location) or not MainModule + ".py" in os.listdir(location):
             continue
-        info = imp.find_module(MainModule, [location])
-        return {"name": name, "info": info, "path": location}
+        spec = importlib.machinery.PathFinder.find_spec(MainModule, [location])
+        return {"name": name, "spec": spec, "path": location}
     raise Exception("Could not find plugin with name " + name)
 
 def load_plugin(plugin):
-    return imp.load_module(MainModule, *plugin["info"])
+    spec = plugin["spec"]
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module