Fix typo in pyproject.toml

Author: MDUYN

pyproject.toml

@@ -25,7 +25,7 @@ polars = { version = "^0.20.10", extras = ["numpy", "pandas"] }
 jupyter = "^1.0.0"
 
 [tool.poetry.extras]
-indicators = ["numpy", "scipy", "tulipy"]
+indicators = ["numpy", "scipy", "tulipy", "collections"]
 
 [tool.poetry.group.test.dependencies]
 coverage= "7.4.2"