[travis] Remove pyyaml restriction

mpsonntag · mpsonntag · commit f701013e4129 · 2020-01-22T20:03:58.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -63,7 +63,7 @@ install:
       export PIPCMD=pip;
     fi;
 
-  - $PIPCMD install lxml enum34 pyyaml==4.2b4 rdflib
+  - $PIPCMD install lxml enum34 pyyaml rdflib
 
 script:
   - which $PYCMD
