From 6e911a52a28cf18b0faae5f7a8db9f584ab03af9 Mon Sep 17 00:00:00 2001
From: semantic-release-bot <semantic-release-bot@martynus.net>
Date: Mon, 20 May 2024 06:04:29 +0000
Subject: [PATCH] chore(release): 6.0.1 [skip ci]

## [6.0.1](https://github.com/RebeccaStevens/deepmerge-ts/compare/v6.0.0...v6.0.1) (2024-05-20)

### Bug Fixes

* type when merging index signatures ([5e8b9b6](https://github.com/RebeccaStevens/deepmerge-ts/commit/5e8b9b668a13ef51da10a5321d4698d01d872013)), closes [#459](https://github.com/RebeccaStevens/deepmerge-ts/issues/459)
---
 CHANGELOG.md                |  7 +++++++
 dist/deno/types/defaults.ts |  3 ++-
 dist/deno/types/utils.ts    |  8 ++++++++
 dist/node/index.d.cts       | 10 +++++++++-
 dist/node/index.d.mts       | 10 +++++++++-
 5 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index aaf7fe26..7abf1cfd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 # Changelog
 All notable changes to this project will be documented in this file. Dates are displayed in UTC.
 
+## [6.0.1](https://github.com/RebeccaStevens/deepmerge-ts/compare/v6.0.0...v6.0.1) (2024-05-20)
+
+
+### Bug Fixes
+
+* type when merging index signatures ([5e8b9b6](https://github.com/RebeccaStevens/deepmerge-ts/commit/5e8b9b668a13ef51da10a5321d4698d01d872013)), closes [#459](https://github.com/RebeccaStevens/deepmerge-ts/issues/459)
+
 # [6.0.0](https://github.com/RebeccaStevens/deepmerge-ts/compare/v5.1.0...v6.0.0) (2024-05-19)
 
 
diff --git a/dist/deno/types/defaults.ts b/dist/deno/types/defaults.ts
index 53b565af..303020e1 100644
--- a/dist/deno/types/defaults.ts
+++ b/dist/deno/types/defaults.ts
@@ -7,6 +7,7 @@ import {
 import {
   type FilterOutNever,
   type FlattenTuples,
+  type KeyIsOptional,
   type SimplifyObject,
   type TransposeTuple,
   type TupleToIntersection,
@@ -75,7 +76,7 @@ type RecordToRecordMeta<T extends Record<PropertyKey, unknown>> = {
   [K in keyof T]-?: {
     key: K;
     value: Required<T>[K];
-    optional: {} extends Pick<T, K> ? true : false;
+    optional: KeyIsOptional<K, T>;
   };
 };
 
diff --git a/dist/deno/types/utils.ts b/dist/deno/types/utils.ts
index dd9e8bed..83a049da 100644
--- a/dist/deno/types/utils.ts
+++ b/dist/deno/types/utils.ts
@@ -55,6 +55,14 @@ export type Or<T1 extends boolean, T2 extends boolean> = T1 extends true
  */
 export type Not<T extends boolean> = T extends true ? false : true;
 
+/**
+ * Check if a key is optional in the given object.
+ */
+export type KeyIsOptional<
+  K extends PropertyKey,
+  O extends { [Key in K]?: unknown },
+> = O extends { [Key in K]: unknown } ? false : true;
+
 /**
  * Returns whether or not all the given types are never.
  */
diff --git a/dist/node/index.d.cts b/dist/node/index.d.cts
index 65b554a8..7ed53f9a 100644
--- a/dist/node/index.d.cts
+++ b/dist/node/index.d.cts
@@ -55,6 +55,14 @@ type Or<T1 extends boolean, T2 extends boolean> = T1 extends true ? true : T2;
  * Not operator for types.
  */
 type Not<T extends boolean> = T extends true ? false : true;
+/**
+ * Check if a key is optional in the given object.
+ */
+type KeyIsOptional<K extends PropertyKey, O extends {
+    [Key in K]?: unknown;
+}> = O extends {
+    [Key in K]: unknown;
+} ? false : true;
 /**
  * Returns whether or not the given type a record.
  */
@@ -380,7 +388,7 @@ type RecordToRecordMeta<T extends Record<PropertyKey, unknown>> = {
     [K in keyof T]-?: {
         key: K;
         value: Required<T>[K];
-        optional: {} extends Pick<T, K> ? true : false;
+        optional: KeyIsOptional<K, T>;
     };
 };
 /**
diff --git a/dist/node/index.d.mts b/dist/node/index.d.mts
index 65b554a8..7ed53f9a 100644
--- a/dist/node/index.d.mts
+++ b/dist/node/index.d.mts
@@ -55,6 +55,14 @@ type Or<T1 extends boolean, T2 extends boolean> = T1 extends true ? true : T2;
  * Not operator for types.
  */
 type Not<T extends boolean> = T extends true ? false : true;
+/**
+ * Check if a key is optional in the given object.
+ */
+type KeyIsOptional<K extends PropertyKey, O extends {
+    [Key in K]?: unknown;
+}> = O extends {
+    [Key in K]: unknown;
+} ? false : true;
 /**
  * Returns whether or not the given type a record.
  */
@@ -380,7 +388,7 @@ type RecordToRecordMeta<T extends Record<PropertyKey, unknown>> = {
     [K in keyof T]-?: {
         key: K;
         value: Required<T>[K];
-        optional: {} extends Pick<T, K> ? true : false;
+        optional: KeyIsOptional<K, T>;
     };
 };
 /**