Updating composer compatibility to 1.9.3

Author: pdohogne-magento

composer.json

@@ -6,7 +6,7 @@
   ],
   "type": "project",
   "require": {
-    "composer/composer": "<=1.9.2",
+    "composer/composer": "<=1.9.3",
     "composer-plugin-api": "^1.0"
   },
   "require-dev": {

src/Magento/ComposerRootUpdatePlugin/composer.json

@@ -8,7 +8,7 @@
   ],
   "type": "composer-plugin",
   "require": {
-    "composer/composer": "<=1.9.2",
+    "composer/composer": "<=1.9.3",
     "composer-plugin-api": "^1.0"
   },
   "autoload": {