Drop 7.2 from build matrix

Author: Andreas Frömer

.github/workflows/continuous-integration.yml

@@ -66,7 +66,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ["7.2", "7.3", "7.4", "8.0"]
+        php-version: ["7.3", "7.4", "8.0"]
         operating-system: ["ubuntu-latest"]
         experimental: [false]
         include: