effects properties added stip/bus sections

FX section added to readme.

fix some docstrings.

fix a couple of jumbled dates in changelog

voicemeeterlib/bus.py

@@ -238,7 +238,7 @@ def _make_bus_mode_mixin():
 def _make_effects_mixin():
     """creates an fx mixin"""
     return type(
-        f"FX",
+        "FX",
         (),
         {
             **{

voicemeeterlib/misc.py

@@ -4,7 +4,7 @@ from .iremote import IRemote
 class FX(IRemote):
     @property
     def identifier(self) -> str:
-        return f"FX"
+        return "FX"
 
     @property
     def reverb(self) -> bool:

voicemeeterlib/strip.py

@@ -298,7 +298,7 @@ _make_channelout_mixins = {
 def _make_effects_mixin(kind):
     """creates an effects mixin for a kind"""
     XY_cls = type(
-        f"XY",
+        "XY",
         (),
         {
             param: float_prop(param)
@@ -314,7 +314,7 @@ def _make_effects_mixin(kind):
     )
 
     FX_cls = type(
-        f"FX",
+        "FX",
         (),
         {
             **{