Added compatibility with Numpy 2

Author: brovelli

frites/config.py

@@ -14,7 +14,7 @@
 # Int and Float types
 INT_DTYPE = (int, np.int8, np.int16, np.int32, np.int64)
 FLOAT_DTYPE = (float, np.float16, np.float32, np.float64)
-STR_DTYPE = (str, np.string_)
+STR_DTYPE = (str, np.bytes_)
 CONFIG['INT_DTYPE'] = INT_DTYPE
 CONFIG['FLOAT_DTYPE'] = FLOAT_DTYPE
 CONFIG['STR_DTYPE'] = STR_DTYPE