Updated PyPI build process

Author: andrewherren

MANIFEST.in

@@ -8,7 +8,7 @@ recursive-include include *.hpp
 # Vendor package source files (excluding R-specific)
 recursive-include src *.cpp
 recursive-include src *.h
-exclude src/R_data.cpp src/R_random_effects.cpp
+exclude src/cpp11.cpp src/forest.cpp src/kernel.cpp src/R_data.cpp src/R_random_effects.cpp src/sampler.cpp src/serialization.cpp src/stochtree_types.h
 
 # Remove the CRAN extensionless LICENSE file
 exclude LICENSE

pyproject.toml

@@ -18,7 +18,7 @@ dynamic = ["readme", "optional-dependencies", "license"]
 description = "Stochastic Tree Ensembles for Machine Learning and Causal Inference"
 requires-python = ">=3.8.0"
 classifiers = [
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",
     "License :: OSI Approved :: MIT License",
     "Operating System :: MacOS",