Try to use python3.6 on travis to enable f-strings

diff --git a/.travis.yml b/.travis.yml
index d17a45a0dc5f90ea2ce0ede4387e380f946c10d5..1790a95a64f03b709db9ed3403117e11f0c00181 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ addons:
       - gcc
       - libsdl2-dev
       - libsdl2-mixer-dev
-      - python3
+      - python3.6
 script:
   - mkdir build/
   - cd build/