chore: Do the migrations

lib/util/index.ts

@@ -17,6 +17,7 @@ export { FileHelper } from "./fileHelper";
 export { getWrapperData } from "./getWrapperData";
 export { deepEqual } from "./deepEqual";
 export { deepMerge } from "./deepMerge";
+export { once } from "./once";
 
 /** Used to check if the file exists before hand */
 export const exists = (

lib/util/once.ts

@@ -0,0 +1,9 @@
+export function once<B>(fn: () => B): () => B {
+  let result: [B] | [] = [];
+  return () => {
+    if (!result.length) {
+      result = [fn()];
+    }
+    return result[0];
+  };
+}