Use older syntax in iprocessexecutor to make it compatible with python 3.10+

Author: Aksem

finecode_extension_api/finecode_extension_api/interfaces/iprocessexecutor.py

@@ -2,7 +2,11 @@
 from asyncio import BaseProtocol
 
 
+T = typing.TypeVar('T')
+P = typing.ParamSpec('P')
+
+
 class IProcessExecutor(BaseProtocol):
-    async def submit[T, **P](
+    async def submit(
         self, func: typing.Callable[P, T], *args: P.args, **kwargs: P.kwargs
     ): ...