Update phpunit to 9.5

Author: dadish

.editorconfig

@@ -0,0 +1,11 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

.prettierrc

@@ -0,0 +1,3 @@
+{
+  "tabWidth": 2
+}

composer.json

@@ -10,14 +10,14 @@
     }
   ],
   "require": {
-    "php": "^7.1",
+    "php": "^7.1||^8.0",
     "webonyx/graphql-php": "^14.3.0"
   },
   "require-dev": {
     "processwire/processwire": "^3.0.164",
     "ryancramerdesign/fieldtypemapmarker": "1.0.0",
     "dadish/graphqlfieldtypemapmarker": "2.0.0",
-    "phpunit/phpunit": "^7.5"
+    "phpunit/phpunit": "^9.5"
   },
   "repositories": [
     {