Update to Silex 2.2, PHP 7.1, PHPUnit 6.5, Symfony 3.4.

.idea/php.xml

@@ -19,7 +19,6 @@
       <path value="$PROJECT_DIR$/vendor/psr/simple-cache" />
       <path value="$PROJECT_DIR$/vendor/sebastian/version" />
       <path value="$PROJECT_DIR$/vendor/psr/container" />
-      <path value="$PROJECT_DIR$/vendor/symfony/polyfill-apcu" />
       <path value="$PROJECT_DIR$/vendor/doctrine/instantiator" />
       <path value="$PROJECT_DIR$/vendor/symfony/console" />
       <path value="$PROJECT_DIR$/vendor/paragonie/random_compat" />
@@ -81,9 +80,10 @@
       <path value="$PROJECT_DIR$/vendor/phpspec/prophecy" />
       <path value="$PROJECT_DIR$/vendor/phpunit/php-token-stream" />
       <path value="$PROJECT_DIR$/vendor/monolog/monolog" />
+      <path value="$PROJECT_DIR$/vendor/symfony/polyfill-php72" />
     </include_path>
   </component>
-  <component name="PhpProjectSharedConfiguration" php_language_level="7.1" />
+  <component name="PhpProjectSharedConfiguration" php_language_level="7" />
   <component name="PhpUnit">
     <phpunit_settings>
       <PhpUnitSettings load_method="CUSTOM_LOADER" custom_loader_path="$PROJECT_DIR$/vendor/autoload.php" />

.idea/silex-book.iml

@@ -63,11 +63,11 @@
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/intl" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/monolog-bridge" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/options-resolver" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-apcu" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-intl-icu" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-mbstring" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-php56" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-php70" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-php72" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/polyfill-util" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/process" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/symfony/property-access" />
@@ -148,11 +148,11 @@
           <root url="file://$MODULE_DIR$/vendor/symfony/intl" />
           <root url="file://$MODULE_DIR$/vendor/symfony/monolog-bridge" />
           <root url="file://$MODULE_DIR$/vendor/symfony/options-resolver" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-apcu" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-intl-icu" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-mbstring" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php56" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php70" />
+          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php72" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-util" />
           <root url="file://$MODULE_DIR$/vendor/symfony/process" />
           <root url="file://$MODULE_DIR$/vendor/symfony/property-access" />
@@ -229,11 +229,11 @@
           <root url="file://$MODULE_DIR$/vendor/symfony/intl" />
           <root url="file://$MODULE_DIR$/vendor/symfony/monolog-bridge" />
           <root url="file://$MODULE_DIR$/vendor/symfony/options-resolver" />
-          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-apcu" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-intl-icu" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-mbstring" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php56" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php70" />
+          <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-php72" />
           <root url="file://$MODULE_DIR$/vendor/symfony/polyfill-util" />
           <root url="file://$MODULE_DIR$/vendor/symfony/process" />
           <root url="file://$MODULE_DIR$/vendor/symfony/property-access" />

composer.json

@@ -11,27 +11,27 @@
     "license": "MIT",
     "name": "fabpot/silex-skeleton",
     "require": {
-        "php": ">=5.5.9",
-        "silex/silex": "~2.0",
-        "silex/web-profiler": "~2.0",
-        "symfony/asset": "~2.8|^3.0",
-        "symfony/browser-kit": "~2.8|^3.0",
-        "symfony/class-loader": "~2.8|^3.0",
-        "symfony/config": "~2.8|^3.0",
-        "symfony/console": "~2.8|^3.0",
-        "symfony/css-selector": "~2.8|^3.0",
-        "symfony/debug": "~2.8|^3.0",
-        "symfony/finder": "~2.8|^3.0",
-        "symfony/form": "~2.8|^3.0",
-        "symfony/monolog-bridge": "~2.8|^3.0",
-        "symfony/process": "~2.8|^3.0",
-        "symfony/security": "~2.8|^3.0",
-        "symfony/translation": "~2.8|^3.0",
-        "symfony/twig-bridge": "~2.8|^3.0",
-        "symfony/validator": "~2.8|^3.0",
+        "php": ">=7.1",
+        "silex/silex": "^2.2",
+        "silex/web-profiler": "^2.0",
+        "symfony/asset": "^3.4",
+        "symfony/browser-kit": "^3.4",
+        "symfony/class-loader": "^3.4",
+        "symfony/config": "^3.4",
+        "symfony/console": "^3.4",
+        "symfony/css-selector": "^3.4",
+        "symfony/debug": "^3.4",
+        "symfony/finder": "^3.4",
+        "symfony/form": "^3.4",
+        "symfony/monolog-bridge": "^3.4",
+        "symfony/process": "^3.4",
+        "symfony/security": "^3.4",
+        "symfony/translation": "^3.4",
+        "symfony/twig-bridge": "^3.4",
+        "symfony/validator": "^3.4",
         "composer/composer": "^1.5",
-        "phpunit/phpunit": "^6.4",
-        "symfony/expression-language": "^3.3"
+        "phpunit/phpunit": "^6.5",
+        "symfony/expression-language": "^3.4"
     },
     "scripts": {
         "run": [