add string helpers

src/utils/helpers/stringHelpers.js

@@ -0,0 +1,16 @@
+/**
+ * Returns a randomly generated string with the specified length
+ *
+ * @param {Number} length
+ * @returns The random string
+ */
+function randomString(length) {
+	var result = "";
+	var characters =
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+	var charactersLength = characters.length;
+	for (var i = 0; i < length; i++) {
+		result += characters.charAt(Math.floor(Math.random() * charactersLength));
+	}
+	return result;
+}