Add yaml parse+mutate+reserialize test

backend/src/yamlParseTest.ts

@@ -0,0 +1,22 @@
+import YAML from "yawn-yaml/cjs";
+import { load } from "js-yaml";
+
+const src = `
+prefix: '!'
+
+plugins:
+  myplugin:
+    config:
+    
+      can_do_thing: true
+      
+      # Lol
+      can_do_other_thing: false
+`;
+
+const json = load(src);
+const yaml = new YAML(src);
+json.plugins.myplugin.config.can_do_thing = false;
+yaml.json = json;
+
+console.log(yaml.yaml);