Tidy up Travis build file (#245)

Co-authored-by: Mark Gibbs <mark@gibbs.consulting>
GibbsConsulting · May 4, 2020 · bd1fb7e · bd1fb7e
1 parent f6c6149
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diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,7 @@ dist: xenial
 language: python
 
 python:
-  - "3.7"
+  - "3.6"
 
 cache:
   - pip

diff --git a/dev_requirements.txt b/dev_requirements.txt
@@ -1,3 +1,5 @@
+asgiref
+attrs==19.3.0
 coveralls>=1.6.0
 channels>=2.0
 channels-redis