Update travis.yml

.travis.yml

@@ -5,12 +5,11 @@
 branches:
   only:
     - master
-    - 3.x
+    - 4.x
 
 language: php
 
 php:
-  - '7.2'
   - '7.3'
   - '7.4'
   - nightly
@@ -30,23 +29,21 @@ env:
 matrix:
   fast_finish: true
   include:
-    - php: '7.2'
+    - php: '7.3'
       env: COMPOSER_FLAGS="--prefer-lowest"
     - php: '7.3'
       env: SYMFONY=4.4.*
     - php: '7.3'
       env: SYMFONY='dev-master as 4.4.x-dev'
     - php: '7.3'
-      env: SONATA_ADMIN=3.*
-    - php: '7.3'
-      env: SONATA_ADMIN='dev-master as 3.x-dev'
+      env: SONATA_ADMIN='dev-master as 4.x-dev'
     - php: '7.3'
       env: SYMFONY_DEPRECATIONS_HELPER=0
   allow_failures:
     - php: nightly
     - env: SYMFONY_DEPRECATIONS_HELPER=0
     - env: SYMFONY='dev-master as 4.4.x-dev'
-    - env: SONATA_ADMIN='dev-master as 3.x-dev'
+    - env: SONATA_ADMIN='dev-master as 4.x-dev'
 
 before_install:
   - git remote add upstream ${UPSTREAM_URL} && git fetch --all