Fix: Bring back support for PHP 7.1

.github/settings.yml

@@ -10,9 +10,12 @@ branches:
         required_approving_review_count: 1
       required_status_checks:
         contexts:
-          - "Coding Standards (7.2)"
+          - "Coding Standards (7.1)"
           - "Dependency Analysis (7.4)"
           - "Static Code Analysis (7.4)"
+          - "Tests (7.1, lowest)"
+          - "Tests (7.1, locked)"
+          - "Tests (7.1, highest)"
           - "Tests (7.2, lowest)"
           - "Tests (7.2, locked)"
           - "Tests (7.2, highest)"

.github/workflows/continuous-integration.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - 7.2
+          - 7.1
 
     steps:
       - name: "Checkout"
@@ -141,6 +141,7 @@ jobs:
     strategy:
       matrix:
         php-version:
+          - 7.1
           - 7.2
           - 7.3
           - 7.4

composer.json

@@ -11,20 +11,20 @@
     }
   ],
   "require": {
-    "php": "^7.2",
+    "php": "^7.1",
     "friendsofphp/php-cs-fixer": "~2.16.0"
   },
   "require-dev": {
-    "ergebnis/composer-normalize": "^2.0.0",
-    "ergebnis/phpstan-rules": "~0.14.0",
-    "ergebnis/test-util": "~0.9.0",
-    "infection/infection": "~0.14.2",
+    "ergebnis/composer-normalize": "^1.3.1",
+    "ergebnis/phpstan-rules": "~0.13.0",
+    "ergebnis/test-util": "~0.9.1",
+    "infection/infection": "~0.13.6",
     "jangregor/phpstan-prophecy": "~0.4.2",
     "phpstan/extension-installer": "^1.0.3",
     "phpstan/phpstan": "~0.11.19",
     "phpstan/phpstan-deprecation-rules": "~0.11.2",
     "phpstan/phpstan-strict-rules": "~0.11.1",
-    "phpunit/phpunit": "^8.4.3"
+    "phpunit/phpunit": "^7.5.18"
   },
   "config": {
     "preferred-install": "dist",