Updated minimum php version from 7.3 to 7.4

Closes #3152

.github/workflows/phpstan.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['7.3']
+        php: ['7.4']
     steps:
     - uses: actions/checkout@v1
 

.github/workflows/phpunit.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['7.3', '7.4', '8.0', '8.1']
+        php: ['7.4', '8.0', '8.1']
     steps:
     - uses: actions/checkout@v1
 

.github/workflows/test-migrations.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['7.3', '7.4', '8.0', '8.1']
+        php: ['7.4', '8.0', '8.1']
     steps:
       - uses: actions/checkout@v1
 

composer.json

@@ -8,7 +8,7 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": "^7.3|^8.0",
+        "php": "^7.4|^8.0",
         "ext-curl": "*",
         "ext-dom": "*",
         "ext-fileinfo": "*",
@@ -95,7 +95,7 @@
         "preferred-install": "dist",
         "sort-packages": true,
         "platform": {
-            "php": "7.3.0"
+            "php": "7.4.0"
         }
     },
     "extra": {

dev/docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM php:7.4-apache
+FROM php:8.1-apache
 
 ENV APACHE_DOCUMENT_ROOT /app/public
 WORKDIR /app