Fix the build issue

conda.recipe/meta.yaml

 package:
   name: rt2ms
-  version: 2023.4.2.0
+  version: 2023.4.2.1
 
 source:
   path: ../
@@ -13,6 +13,7 @@ requirements:
   build:
     - python >=3.9
     - pip
+    - setuptools
   run:
     - python >=3.9
     - obspy >=1.3.0

obspy_replace/__init__.py

@@ -4,4 +4,4 @@
 
 __author__ = """IRIS PASSCAL"""
 __email__ = 'software-support@passcal.nmt.edu'
-__version__ = '2023.4.2.0'
+__version__ = '2023.4.2.1'

rt2ms_py3/__init__.py

@@ -4,4 +4,4 @@
 
 __author__ = """IRIS PASSCAL"""
 __email__ = 'software-support@passcal.nmt.edu'
-__version__ = '2023.4.2.0'
+__version__ = '2023.4.2.1'

setup.py

@@ -49,6 +49,6 @@ setup(
     name='rt2ms',
     packages=find_packages(include=['rt2ms_py3', 'obspy_replace']),
     url='https://git.passcal.nmt.edu/software_public/passoft/rt2ms_py3',
-    version='2023.4.2.0',
+    version='2023.4.2.1',
     zip_safe=False,
 )