Update composer.json

Pin dependencies

Author: jbelien

composer.json

@@ -13,15 +13,15 @@
     },
     "require": {
         "php": "^7.2",
-        "symfony/process": "^4.0",
-        "zendframework/zend-component-installer": "^2.1",
-        "zendframework/zend-config": "^3.1",
-        "zendframework/zend-config-aggregator": "^1.1",
-        "zendframework/zend-diactoros": "^1.7",
-        "zendframework/zend-expressive": "^3.0",
-        "zendframework/zend-expressive-fastroute": "^3.0",
-        "zendframework/zend-expressive-helpers": "^5.0",
-        "zendframework/zend-servicemanager": "^3.3"
+        "symfony/process": "4.1.0",
+        "zendframework/zend-component-installer": "2.1.1",
+        "zendframework/zend-config": "3.2.0",
+        "zendframework/zend-config-aggregator": "1.1.1",
+        "zendframework/zend-diactoros": "1.7.2",
+        "zendframework/zend-expressive": "3.0.2",
+        "zendframework/zend-expressive-fastroute": "3.0.1",
+        "zendframework/zend-expressive-helpers": "5.1.0",
+        "zendframework/zend-servicemanager": "3.3.2"
     },
     "autoload": {
         "psr-4": {