Run integration tests on 2.4-develop branch, allow failures

Author: schmengler

.travis.yml

@@ -25,11 +25,21 @@ jobs:
         - MAGENTO_VERSION=2.4
         - TEST_SUITE=integration
         - COVERAGE=true
+    - php: 7.4
+      env:
+        - MAGENTO_VERSION=2.4-develop
+        - TEST_SUITE=integration
     - php: 7.4
       env:
         - MAGENTO_VERSION=2.4
         - TEST_SUITE=unit
         - COVERAGE=true
+  allow_failures:
+      - php: 7.4
+        env:
+            - MAGENTO_VERSION=2.4-develop
+            - TEST_SUITE=integration
+
 env:
   global:
     - COMPOSER_BIN_DIR=~/bin

.travis/before_script.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -e
+set -ex
 trap '>&2 echo Error: Command \`$BASH_COMMAND\` on line $LINENO failed with exit code $?' ERR
 
 # mock mail