Set up Infection

.gitattributes

@@ -1,14 +1,15 @@
-/.github        export-ignore
-/.phive         export-ignore
-/.psalm         export-ignore
-/build          export-ignore
-/tests          export-ignore
-/tools          export-ignore
-/tools/*        binary
-/.gitattributes export-ignore
-/.gitignore     export-ignore
-/.php-cs-fixer.dist.php   export-ignore
-/build.xml      export-ignore
-/phpunit.xml    export-ignore
+/.github                export-ignore
+/.phive                 export-ignore
+/.psalm                 export-ignore
+/build                  export-ignore
+/tests                  export-ignore
+/tools                  export-ignore
+/tools/*                binary
+/.gitattributes         export-ignore
+/.gitignore             export-ignore
+/.php-cs-fixer.dist.php export-ignore
+/build.xml              export-ignore
+/infection.json5.dist   export-ignore
+/phpunit.xml            export-ignore
 
 *.php diff=php

infection.json → infection.json5.dist

@@ -1,13 +1,13 @@
 {
+    "$schema": "https://raw.githubusercontent.com/infection/infection/0.28.1/resources/schema.json",
+    "phpUnit": {
+        "customPath": "tools/phpunit"
+    },
     "source": {
         "directories": [
             "src"
         ]
     },
-    "phpUnit": {
-        "customPath": "tools/phpunit"
-    },
-    "bootstrap": "vendor/autoload.php",
     "mutators": {
         "@default": true,
         "Continue_": {
@@ -17,6 +17,5 @@
         }
     },
     "minMsi": 100,
-    "minCoveredMsi": 100,
-    "testFrameworkOptions": "--testsuite=unit"
+    "minCoveredMsi": 100
 }