Add missing build-system in pyproject (#617)

Author: cbornet

libs/colbert/pyproject.toml

@@ -47,3 +47,7 @@ strict_optional = true
 warn_redundant_casts = true
 warn_return_any = true
 warn_unused_ignores = true
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

libs/langchain/pyproject.toml

@@ -42,3 +42,7 @@ pytest-asyncio = "^0.23.6"
 
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

libs/llamaindex/pyproject.toml

@@ -67,3 +67,7 @@ strict_optional = true
 warn_redundant_casts = true
 warn_return_any = true
 warn_unused_ignores = true
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

libs/tests-utils/pyproject.toml

@@ -34,4 +34,8 @@ strict_equality = true
 strict_optional = true
 warn_redundant_casts = true
 warn_return_any = true
-warn_unused_ignores = true
+warn_unused_ignores = true
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"