updates travis

Author: saxix

Diff for: .travis.yml

@@ -18,14 +18,7 @@ services:
 
 
 env:
-  - DJANGO=1.11 DB=pg
-  - DJANGO=2.1 DB=pg
-  - DJANGO=2.2 DB=pg
   - DJANGO=3.0 DB=pg
-
-  - DJANGO=1.11 DB=mysql
-  - DJANGO=2.1 DB=mysql
-  - DJANGO=2.2 DB=mysql
   - DJANGO=3.0 DB=mysql