CLN: move away from numpy.fix in favor of numpy.trunc (pandas-dev#63074)

Author: hellerve

pandas/_libs/tslibs/timestamps.pyx

@@ -3492,7 +3492,7 @@ default 'raise'
             year -= 1
             month += 12
         return (day +
-                np.fix((153 * month - 457) / 5) +
+                np.trunc((153 * month - 457) / 5) +
                 365 * year +
                 np.floor(year / 4) -
                 np.floor(year / 100) +

pandas/core/arrays/datetimes.py

@@ -2287,7 +2287,7 @@ def to_julian_date(self) -> npt.NDArray[np.float64]:
         month[testarr] += 12
         return (
             day
-            + np.fix((153 * month - 457) / 5)
+            + np.trunc((153 * month - 457) / 5)
             + 365 * year
             + np.floor(year / 4)
             - np.floor(year / 100)