update downloads

mhcflurry/downloads.yml

@@ -45,7 +45,7 @@ releases:
               default: false
 
             - name: data_evaluation
-              url: https://github.com/openvax/mhcflurry/releases/download/1.6.0/data_evaluation.20200209.tar.bz2
+              url: https://github.com/openvax/mhcflurry/releases/download/pre-1.7.0/data_evaluation.20200513.tar.bz2
               default: false
 
             - name: data_predictions