add curio (optional)

diff --git a/pyproject.toml b/pyproject.toml
index b33fe00d97c6e722599b64eeb3ac086800752c37..3c6e85b4e154a87142d35ec7b32d3e1c2ded5650 100644 (file)
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ requests = {version="^2.23.0", optional=true}
 idna = {version="^2.1", optional=true}
 cryptography = {version="^2.6", optional=true}
 trio = {version="^0.14", optional=true}
+curio = {version="^1.2", optional=true}
 
 [tool.poetry.dev-dependencies]
 mypy = "^0.770"