Update requirements.txt

junpenglao · aseyboldt · junpenglao · commit 77873e913f7f · 2020-07-06T23:34:03.000+02:00
Co-authored-by: Adrian Seyboldt &lt;aseyboldt@users.noreply.github.com&gt;
diff --git a/requirements.txt b/requirements.txt
@@ -8,3 +8,4 @@ fastprogress>=0.2.0
 h5py>=2.7.0
 typing-extensions>=3.7.4
 dataclasses; python_version < '3.7'
+contextvars; python_version < '3.7' 
