Ensure that juliapkg.json is installed

pyproject.toml

@@ -20,9 +20,9 @@ classifiers = [
 dynamic = ["dependencies"]
 
 [tool.setuptools]
-packages = ["pysr"]
+packages = ["pysr", "pysr._cli", "pysr.test"]
 include-package-data = false
-package-data = {pysr = ["../datasets/*"]}
+package-data = {pysr = ["juliapkg.json"]}
 
 [tool.setuptools.dynamic]
 dependencies = {file = "requirements.txt"}