Designate case_utils as a typed package

References:
* [AC-211] Add static type checking to CASE-Utilities-Python
* https://www.python.org/dev/peps/pep-0561/

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

case_utils/py.typed

@@ -0,0 +1,13 @@
+# This software was developed at the National Institute of Standards
+# and Technology by employees of the Federal Government in the course
+# of their official duties. Pursuant to title 17 Section 105 of the
+# United States Code this software is not subject to copyright
+# protection and is in the public domain. NIST assumes no
+# responsibility whatsoever for its use by other parties, and makes
+# no guarantees, expressed or implied, about its quality,
+# reliability, or any other characteristic.
+#
+# We would appreciate acknowledgement if the software is used.
+
+# This file is defined to support PEP 561:
+# https://www.python.org/dev/peps/pep-0561/

setup.cfg

@@ -15,6 +15,7 @@ classifiers =
     Programming Language :: Python :: 3
 
 [options]
+include_package_data = true
 # TODO The constraint on pyparsing can be removed when rdflib Issue #1190 is resolved.
 # https://github.com/RDFLib/rdflib/issues/1190
 install_requires =
@@ -32,3 +33,6 @@ console_scripts =
     case_sparql_construct = case_utils.case_sparql_construct:main
     # Note that numpy (pandas dependency, and pandas is dependency of case_sparql_select) is only supported in Python >= 3.7.
     case_sparql_select = case_utils.case_sparql_select:main
+
+[options.package_data]
+case_utils = py.typed