Fix authentication for PR by external contributors

.composer-auth.json

@@ -0,0 +1,7 @@
+{
+    "github-oauth": {
+        "github.com": "PLEASE DO NOT USE THIS TOKEN IN YOUR OWN PROJECTS/FORKS",
+        "github.com": "This token is reserved for testing the wallabag/wallabag repository",
+        "github.com": "dc690078d5c2effdbc5ca1a6a715ad5e9c075ff1"
+    }
+}

.travis.yml

@@ -47,6 +47,9 @@ before_script:
     - if [ -n "$GH_TOKEN" ]; then composer config github-oauth.github.com ${GH_TOKEN}; fi;
     - if [[ "$DB" = "pgsql" ]]; then psql -c 'create database wallabag;' -U postgres; fi;
 
+before_install:
+    - if [[ $TRAVIS_REPO_SLUG = wallabag/wallabag ]]; then cp .composer-auth.json ~/.composer/auth.json; fi;
+
 script:
     - travis_wait composer update --no-interaction --no-progress
     - ant prepare-$DB