Drop support for PHP 7.2

Author: dktapps

.github/workflows/main.yml

@@ -11,8 +11,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - php: 7.2.34
-            pthreads-version: 46962cf9c2d30b6e1e1ea50ca36de3df5d6d4e58
           - php: 7.3.25
             pthreads-version: 34d7e6b91ed92a625760fedd667e7cba2009e463
           - php: 7.4.13

composer.json

@@ -3,7 +3,7 @@
     "description": "Thread notification management library for code using the pthreads extension",
     "type": "library",
     "require": {
-        "php-64bit": "^7.2 || ^8.0",
+        "php-64bit": "^7.3 || ^8.0",
         "ext-pthreads": ">=3.1.7dev"
     },
     "require-dev": {