Use "poetry.core" build backend.
References
@@ -160,5 +160,5 @@ convention = "numpy"
add-ignore = "D104,D200,D202,D205,D301,D400"
[build-system]
-requires = [ "poetry>=0.12" ]
-build-backend = "poetry.masonry.api"
+requires = ["poetry_core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
