update travis solidus versions

Author: ccarruitero

.travis.yml

@@ -12,15 +12,15 @@ rvm:
   - 2.6.0
 env:
   matrix:
-    - SOLIDUS_BRANCH=v2.5 DB=postgres
-    - SOLIDUS_BRANCH=v2.6 DB=postgres
     - SOLIDUS_BRANCH=v2.7 DB=postgres
     - SOLIDUS_BRANCH=v2.8 DB=postgres
+    - SOLIDUS_BRANCH=v2.9 DB=postgres
+    - SOLIDUS_BRANCH=v2.10 DB=postgres
     - SOLIDUS_BRANCH=master DB=postgres
-    - SOLIDUS_BRANCH=v2.5 DB=mysql
-    - SOLIDUS_BRANCH=v2.6 DB=mysql
     - SOLIDUS_BRANCH=v2.7 DB=mysql
     - SOLIDUS_BRANCH=v2.8 DB=mysql
+    - SOLIDUS_BRANCH=v2.9 DB=mysql
+    - SOLIDUS_BRANCH=v2.10 DB=mysql
     - SOLIDUS_BRANCH=master DB=mysql
 services:
   - mysql