updating deprecated scipy integrate names

saltshaker/util/specrecal.py

@@ -4,7 +4,7 @@
 
 from scipy.optimize import minimize
 from scipy.interpolate import interp1d
-from scipy.integrate import trapz
+from scipy.integrate import trapezoid as trapz
 import numpy as np
 from saltshaker.util.synphot import synphot
 from sncosmo.constants import HC_ERG_AA