diff --git a/dist/util.d.ts b/dist/util.d.ts
new file mode 100644
index 0000000..79a76b8
--- /dev/null
+++ b/dist/util.d.ts
@@ -0,0 +1,2 @@
+export declare function flatten(target: any, opts?: any): any[];
+//# sourceMappingURL=util.d.ts.map
\ No newline at end of file
diff --git a/dist/util.d.ts.map b/dist/util.d.ts.map
new file mode 100644
index 0000000..876e5eb
--- /dev/null
+++ b/dist/util.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"util.d.ts","sourceRoot":"","sources":["../src/util.ts"],"names":[],"mappings":"AAWA,wBAAgB,OAAO,CAAC,MAAM,EAAE,GAAG,EAAE,IAAI,GAAE,GAAQ,GAAG,GAAG,EAAE,CAuC1D"}
\ No newline at end of file
diff --git a/dist/util.js b/dist/util.js
new file mode 100644
index 0000000..91bc79e
--- /dev/null
+++ b/dist/util.js
@@ -0,0 +1,39 @@
+function isBuffer(obj) {
+    return (obj &&
+        obj.constructor &&
+        typeof obj.constructor.isBuffer === "function" &&
+        obj.constructor.isBuffer(obj));
+}
+/*
+Forked from https://github.com/hughsk/flat
+ */
+export function flatten(target, opts = {}) {
+    opts = opts || {};
+    const delimiter = opts.delimiter || ".";
+    const maxDepth = opts.maxDepth;
+    const transformKey = opts.transformKey || ((key) => (isNaN(parseInt(key)) ? key : ""));
+    const output = [];
+    function step(object, prev, currentDepth) {
+        currentDepth = currentDepth || 1;
+        Object.keys(object).forEach(function (key) {
+            const value = object[key];
+            const isarray = opts.safe && Array.isArray(value);
+            const type = Object.prototype.toString.call(value);
+            const isbuffer = isBuffer(value);
+            const isobject = type === "[object Object]" || type === "[object Array]";
+            const newKey = prev
+                ? prev + delimiter + transformKey(key)
+                : transformKey(key);
+            if (!isarray &&
+                !isbuffer &&
+                isobject &&
+                Object.keys(value).length &&
+                (!opts.maxDepth || currentDepth < maxDepth)) {
+                return step(value, newKey, currentDepth + 1);
+            }
+            output.push(`${newKey}=${value}`);
+        });
+    }
+    step(target);
+    return output;
+}