treelite: new package at v0.93 (#18861)

var/spack/repos/builtin/packages/treelite/package.py

+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Treelite(CMakePackage):
+    """Treelite is a model compiler for efficient deployment of
+    decision tree ensembles."""
+
+    homepage = "https://github.com/dmlc/treelite"
+    url      = "https://github.com/dmlc/treelite/archive/0.93.tar.gz"
+
+    version('0.93',    sha256='7d347372f7fdc069904afe93e69ed0bf696ba42d271fe2f8bf6835d2ab2f45d5')