Fix PHP version configuration in composer.json

Without this setting, composer would download dependencies depending on the PHP version installed on the system.
E.G. I was getting doctrine/instantiator 1.1, which requires at least PHP 7.1.

1 files changed, 5 insertions, 0 deletions

diff --git a/composer.json b/composer.json
index 792c43d3..756ea588 100644
--- a/composer.json
+++ b/composer.json
@@ -9,6 +9,11 @@
         "wiki": "https://github.com/shaarli/Shaarli/wiki"
     },
     "keywords": ["bookmark", "link", "share", "web"],
+    "config": {
+        "platform": {
+            "php": "5.5.38"
+        }
+    },
     "require": {
         "php": ">=5.5",
         "shaarli/netscape-bookmark-parser": "^2.0",