fix: sort ts before aligning

aligner.py

@@ -222,7 +222,8 @@ def interp_missing_1(ts):
 
 def interp_missing(ts_a_o, ts_b_o):
     """interpolate missing beats"""
-    ts_a, ts_b = np.array(ts_a_o), np.array(ts_b_o)  # deep copy
+    ts_a = np.array(list(sorted(ts_a_o)))
+    ts_b = np.array(list(sorted(ts_b_o)))  # sort & deep copy
     assert len(ts_a) == len(ts_b)
     ib_th = 0.2  #: sec (inter-beat interval threshold for interpolation)
     mn_a, mn_b = np.mean(np.diff(ts_a)), np.mean(np.diff(ts_b))