chore: update poetry version to 1.5

Author: nh13

.github/workflows/pythonpackage.yml

@@ -2,7 +2,7 @@ name: Python package
 
 on: [push]
 env:
-  POETRY_VERSION: 1.2
+  POETRY_VERSION: 1.5
 
 jobs:
   testing:

pyproject.toml

@@ -44,5 +44,5 @@ pytest-cov = ">=2.8.1"
 isort = ">=5.10.1"
 
 [build-system]
-requires = ["poetry>=1.2"]
+requires = ["poetry>=1.5"]
 build-backend = "poetry.masonry.api"