Configure SymfonyInsight via config file

Author: colinodell

.gitattributes

@@ -8,6 +8,7 @@
 /.gitignore         export-ignore
 /.scrutinizer.yml   export-ignore
 /.styleci.yml       export-ignore
+/.symfony.insight.yaml export-ignore
 /CODE_OF_CONDUCT.md export-ignore
 /CONTRIBUTING.md    export-ignore
 /phpunit.xml.dist   export-ignore

.symfony.insight.yaml

@@ -0,0 +1,7 @@
+# SymfonyInsight seems to cache composer.lock against our wishes
+pre_composer_script: rm -rf composer.lock
+
+rules:
+    # We do want json5_decode() exposed as a global function
+    php.use_global_variable_or_function:
+        enabled: false