use importlib instead of pkg_resources via ocrd_utils

Author: Robert Sachunsky

ocrd_cis/ocrd_tool.py

@@ -1,5 +1,5 @@
 import json
-from pkg_resources import resource_string
+from ocrd_utils import resource_string
 
 
 def get_ocrd_tool():

setup.py

@@ -38,7 +38,7 @@
     packages=find_packages(),
     include_package_data=True,
     install_requires=[
-        'ocrd>=2.30',
+        'ocrd>=2.47',
         'click',
         'scipy',
         'numpy>=1.17.0',