Typing extensions are not only dev-requirements

Author: Cito

pyproject.toml

@@ -43,6 +43,7 @@ packages = [
 
 [tool.poetry.dependencies]
 python = "^3.6"
+typing-extensions = { version = "^4.0", python = "<3.8" }
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2"
@@ -54,7 +55,6 @@ pytest-benchmark = "^3.4"
 pytest-cov = "^3.0"
 pytest-describe = "^2.0"
 pytest-timeout = "^2.0"
-typing-extensions = { version = "^4.0", python = "<3.8" }
 black = [
     {version = "21.12b0", python = ">=3.6.2"},
     {version = "20.8b1", python = "<3.6.2"}