Add trapz kernel and switch to PR testing for warnings

.github/workflows/monthly-warning-test.yml

@@ -5,6 +5,10 @@ on:
   schedule:
     # Runs "First of every month at 3:15am Central"
     - cron: '15 8 1 * *'
+  push:
+    branches:
+      - main
+  pull_request: null
 
 jobs:
   tests:

dsps/utils.py

@@ -281,6 +281,27 @@ def cumtrapz(xarr, yarr):
     return cumtrapz
 
 
+@jjit
+def trapz(xarr, yarr):
+    """Trapezoidal integral
+
+    Parameters
+    ----------
+    xarr : ndarray, shape (n, )
+
+    yarr : ndarray, shape (n, )
+
+    Returns
+    -------
+    result : float
+
+    """
+    res_init = xarr[0], yarr[0], 0.0
+    scan_data = xarr, yarr
+    cumtrapz = scan(_cumtrapz_scan_func, res_init, scan_data)[1]
+    return cumtrapz[-1]
+
+
 @jjit
 def cumulative_mstar_formed(t_table, sfh_table):
     """Compute the cumulative stellar mass formed at each input time