travis: fix 3.5 test bug in attrs

Using specific version (pre 20) should fix the issue https://github.com/ARMmbed/mbed-os/issues/14110
2021-01-04 15:14:57 +00:00 · 2021-01-04 15:14:57 +00:00 · 185545adb9
parent a9d72466b9
commit 185545adb9
1 changed files with 1 additions and 0 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -160,6 +160,7 @@ matrix:
        - |-
          tr -d ' ' >> requirements.txt <<< "
          mock==2.0.0
+          attrs==19.1.0
          pytest==3.3.0
          pylint>=1.9,<2
          hypothesis>=3,<4