add outcome as direct dependency

Fixes #196

Author: belm0

Diff for: requirements-dev-full.txt

@@ -100,6 +100,7 @@ outcome==1.3.0.post0
     # via
     #   pytest-trio
     #   trio
+    #   trio-websocket (setup.py)
 packaging==24.2
     # via
     #   build

Diff for: requirements-dev.txt

@@ -38,6 +38,7 @@ outcome==1.3.0.post0
     # via
     #   pytest-trio
     #   trio
+    #   trio-websocket (setup.py)
 packaging==24.2
     # via
     #   build

Diff for: setup.py

@@ -44,6 +44,7 @@
     package_data={"trio-websocket": ["py.typed"]},
     install_requires=[
         'exceptiongroup; python_version<"3.11"',
+        'outcome>=1.2.0',
         'trio>=0.11',
         'wsproto>=0.14',
     ],