pin jupyter server proxy (#107)

Author: oeway

imjoy_elfinder/VERSION

@@ -1,3 +1,3 @@
 {
-    "version": "0.1.55"
+    "version": "0.1.56"
 }

setup.py

@@ -48,7 +48,11 @@ def read(name):
         "Framework :: Pyramid ",
         "Topic :: Internet",
     ],
-    extras_require={"jupyter": ["jupyter-server-proxy"]},
+    extras_require={
+        "jupyter": [
+            "jupyter-server-proxy @ http://github.com/oeway/jupyter-server-proxy/tarball/master#egg=jupyter-server-proxy"
+        ]
+    },
     entry_points={
         "console_scripts": ["imjoy-elfinder = imjoy_elfinder.app:main"],
         "jupyter_serverproxy_servers": [