doc: add pypi classifiers

the ones related to programming language or license are automatically added by poetry

Author: malyvsen

pyproject.toml

@@ -8,19 +8,23 @@ readme = "README.rst"
 repository = "https://github.com/Aiwizo/pytorch-lantern"
 documentation = "https://pytorch-lantern.readthedocs.io"
 keywords = [
-    "pytorch",
-    "machine",
-    "learning"
+  "pytorch",
+  "machine",
+  "learning"
 ]
 # some classifiers are added automatically, see https://python-poetry.org/docs/pyproject/#classifiers
 classifiers = [
-    "Intended Audience :: Developers",
-    "Intended Audience :: Science/Research",
-    "Topic :: Scientific/Engineering",
-    "Topic :: Scientific/Engineering :: Artificial Intelligence",
-    "Topic :: Software Development",
-    "Topic :: Software Development :: Libraries",
-    "Topic :: Software Development :: Libraries :: Python Modules"
+  "Development Status :: 3 - Alpha",
+  "Environment :: Other Environment",
+  "License :: OSI Approved :: Apache Software License",
+  "Operating System :: OS Independent",
+  "Intended Audience :: Developers",
+  "Intended Audience :: Science/Research",
+  "Topic :: Scientific/Engineering",
+  "Topic :: Scientific/Engineering :: Artificial Intelligence",
+  "Topic :: Software Development",
+  "Topic :: Software Development :: Libraries",
+  "Topic :: Software Development :: Libraries :: Python Modules"
 ]
 packages = [
     { include = "lantern" },