py26: pin httpbin version in tox

kevin1024 · kevin1024 · commit 22f34266af5d · 2017-10-28T11:29:55.000-10:00
diff --git a/tox.ini b/tox.ini
@@ -6,4 +6,5 @@ envlist = py26, py27, py33, py34, py35, py36, pypy, pypy3
 [testenv]
 deps = pytest
        requests
+       py26: httpbin==0.5.0
 commands = ./runtests.sh {posargs:tests/}
