fix: move composer.json out of root to avoid confusion (#9819)

* move composer.json out of root to avoid confusion

* fix: update php deployed json

php/composer.json.dist

@@ -6,10 +6,10 @@
   "homepage": "https://developers.google.com/protocol-buffers/",
   "license": "BSD-3-Clause",
   "require": {
-    "php": ">=5.5.0"
+    "php": ">=7.0.0"
   },
   "require-dev": {
-    "phpunit/phpunit": ">=4.8.0"
+    "phpunit/phpunit": ">=5.0.0"
   },
   "suggest": {
     "ext-bcmath": "Need to support JSON deserialization"

php/release.sh

@@ -26,7 +26,7 @@ popd
 # Copy files
 pushd protobuf-php
 mv ../protobuf/php/src src
-mv ../protobuf/composer.json composer.json
+mv ../protobuf/php/composer.json.dist composer.json
 sed -i 's|php/src|src|g' composer.json
 git add .
 git commit -m "$VERSION"