Drop support for PHP 7.3

- Update laminas-coding-standard to ~2.40 (Closes #18)
- Stop ignoring platform reqs on 8.1
- tidy up dot files and export-ignores

Signed-off-by: George Steel <[email protected]>

Author: gsteel

.coveralls.yml

@@ -1,5 +1,3 @@
-/.coveralls.yml export-ignore
-/.docheader export-ignore
 /.gitattributes export-ignore
 /.github/ export-ignore
 /.gitignore export-ignore

.gitattributes

@@ -1,5 +1,2 @@
 {
-  "ignore_php_platform_requirements": {
-    "8.1": true
-  }
 }

.laminas-ci.json

@@ -23,7 +23,7 @@
     "config": {
         "sort-packages": true,
         "platform": {
-            "php": "7.3.99"
+            "php": "7.4.99"
         },
         "allow-plugins": {
             "dealerdirect/phpcodesniffer-composer-installer": true
@@ -35,15 +35,15 @@
         }
     },
     "require": {
-        "php": "^7.3 || ~8.0.0 || ~8.1.0",
+        "php": "^7.4 || ~8.0.0 || ~8.1.0",
         "mezzio/mezzio-helpers": "^5.0",
         "mezzio/mezzio-router": "^3.7",
         "mezzio/mezzio-template": "^2.0",
         "psr/container": "^1.0",
         "twig/twig": "^3.3.8"
     },
     "require-dev": {
-        "laminas/laminas-coding-standard": "~2.2.0",
+        "laminas/laminas-coding-standard": "~2.4.0",
         "phpunit/phpunit": "^9.5.24"
     },
     "conflict": {