feature #905 Updated to Symfony 4.2 stable (javiereguiluz)

This PR was squashed before being merged into the master branch (closes #905).

Discussion
----------

Updated to Symfony 4.2 stable

Commits
-------

164daf4 Updated to Symfony 4.2 stable

Author: javiereguiluz

.travis.yml

@@ -9,7 +9,7 @@ cache:
 env:
   global:
     - SYMFONY_PHPUNIT_DIR=./bin/.phpunit
-    - SYMFONY_DEPRECATIONS_HELPER=9
+    - SYMFONY_DEPRECATIONS_HELPER=29
 
 matrix:
   fast_finish: true
@@ -40,8 +40,5 @@ script:
   - ./bin/console lint:xliff translations
   # this checks that the application doesn't use dependencies with known security vulnerabilities
   - ./bin/console security:check
-  # this checks that the composer.json and composer.lock files are valid
-  # disabled until 'symfony/webpack-encore-bundle' releases a stable version (to avoid using 'dev-master')
-  #- composer validate --strict
   # this checks that Doctrine's mapping configurations are valid
   - ./bin/console doctrine:schema:validate --skip-sync -vvv --no-interaction

composer.json

@@ -3,7 +3,6 @@
     "license": "MIT",
     "type": "project",
     "description": "Symfony Demo Application",
-    "minimum-stability": "dev",
     "require": {
         "php": "^7.1.3",
         "ext-pdo_sqlite": "*",
@@ -12,37 +11,37 @@
         "doctrine/orm": "^2.5.11",
         "erusev/parsedown": "^1.6",
         "ezyang/htmlpurifier": "^4.9",
-        "sensio/framework-extra-bundle": "^5.0",
+        "sensio/framework-extra-bundle": "^5.1",
         "sensiolabs/security-checker": "^5.0",
-        "symfony/asset": "4.2.*",
-        "symfony/expression-language": "4.2.*",
+        "symfony/asset": "*",
+        "symfony/expression-language": "*",
         "symfony/flex": "^1.1",
-        "symfony/form": "4.2.*",
-        "symfony/framework-bundle": "4.2.*",
+        "symfony/form": "*",
+        "symfony/framework-bundle": "*",
         "symfony/monolog-bundle": "^3.1",
         "symfony/polyfill-php72": "^1.8",
-        "symfony/security-bundle": "4.2.*",
+        "symfony/security-bundle": "*",
         "symfony/swiftmailer-bundle": "^3.1",
-        "symfony/translation": "4.2.*",
-        "symfony/twig-bundle": "4.2.*",
-        "symfony/validator": "4.2.*",
+        "symfony/translation": "*",
+        "symfony/twig-bundle": "*",
+        "symfony/validator": "*",
         "symfony/webpack-encore-bundle": "dev-master",
-        "symfony/yaml": "4.2.*",
+        "symfony/yaml": "*",
         "twig/extensions": "^1.5",
         "white-october/pagerfanta-bundle": "^1.1"
     },
     "require-dev": {
         "dama/doctrine-test-bundle": "^5.0",
         "doctrine/doctrine-fixtures-bundle": "^3.0",
         "friendsofphp/php-cs-fixer": "^2.12",
-        "symfony/browser-kit": "4.2.*",
-        "symfony/css-selector": "4.2.*",
-        "symfony/debug-bundle": "4.2.*",
-        "symfony/dotenv": "4.2.*",
-        "symfony/phpunit-bridge": "4.2.*",
-        "symfony/stopwatch": "4.2.*",
-        "symfony/web-profiler-bundle": "4.2.*",
-        "symfony/web-server-bundle": "4.2.*"
+        "symfony/browser-kit": "*",
+        "symfony/css-selector": "*",
+        "symfony/debug-bundle": "*",
+        "symfony/dotenv": "*",
+        "symfony/phpunit-bridge": "*",
+        "symfony/stopwatch": "*",
+        "symfony/web-profiler-bundle": "*",
+        "symfony/web-server-bundle": "*"
     },
     "config": {
         "platform": {