Merge pull request #1531 from moduon/poetry-core

build: update backend to poetry-core

Author: roberth

pyproject.toml

@@ -37,8 +37,8 @@ charon = 'nixops.__main__:main'
 
 
 [build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
+requires = ["poetry-core>=1"]
+build-backend = "poetry.core.masonry.api"
 
 [tool.pytest.ini_options]
 addopts = """