add build dependencies back to pyproject.toml
[build-system]
-requires = ["setuptools"]
+requires = [
+ "setuptools",
+ "wheel",
+ "cython>=0.25",
+ "cymem>=2.0.2,<2.1.0",
+ "preshed>=3.0.2,<3.1.0",
+ "murmurhash>=0.28.0,<1.1.0",
+ "thinc==7.4.0.dev0",
+]
build-backend = "setuptools.build_meta"
