Changed code to support older Python versions

venv/lib/python3.11/site-packages/uvloop/handles/timer.pxd

@@ -0,0 +1,18 @@
+cdef class UVTimer(UVHandle):
+    cdef:
+        method_t callback
+        object ctx
+        bint running
+        uint64_t timeout
+        uint64_t start_t
+
+    cdef _init(self, Loop loop, method_t callback, object ctx,
+               uint64_t timeout)
+
+    cdef stop(self)
+    cdef start(self)
+    cdef get_when(self)
+
+    @staticmethod
+    cdef UVTimer new(Loop loop, method_t callback, object ctx,
+                     uint64_t timeout)