diff --git a/wp-includes/embed.php b/wp-includes/embed.php
index 48c2212783..b5cd5469ab 100644
--- a/wp-includes/embed.php
+++ b/wp-includes/embed.php
@@ -446,7 +446,7 @@ function get_post_embed_html( $width, $height, $post = null ) {
 	} else {
 		/*
 		 * If you're looking at a src version of this file, you'll see an "include"
-		 * statement below. This is used by the `grunt build` process to directly
+		 * statement below. This is used by the `npm run build` process to directly
 		 * include a minified version of wp-embed.js, instead of using the
 		 * file_get_contents() method from above.
 		 *
@@ -1008,7 +1008,7 @@ function print_embed_styles() {
 	} else {
 		/*
 		 * If you're looking at a src version of this file, you'll see an "include"
-		 * statement below. This is used by the `grunt build` process to directly
+		 * statement below. This is used by the `npm run build` process to directly
 		 * include a minified version of wp-oembed-embed.css, instead of using the
 		 * readfile() method from above.
 		 *
@@ -1040,7 +1040,7 @@ function print_embed_scripts() {
 	} else {
 		/*
 		 * If you're looking at a src version of this file, you'll see an "include"
-		 * statement below. This is used by the `grunt build` process to directly
+		 * statement below. This is used by the `npm run build` process to directly
 		 * include a minified version of wp-embed-template.js, instead of using the
 		 * readfile() method from above.
 		 *
diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 37cb532c12..934d575d1c 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -5520,7 +5520,7 @@ function _print_emoji_detection_script() {
 
 		/*
 		 * If you're looking at a src version of this file, you'll see an "include"
-		 * statement below. This is used by the `grunt build` process to directly
+		 * statement below. This is used by the `npm run build` process to directly
 		 * include a minified version of wp-emoji-loader.js, instead of using the
 		 * readfile() method from above.
 		 *
@@ -5736,7 +5736,7 @@ function wp_staticize_emoji_for_email( $mail ) {
  * Returns arrays of emoji data.
  *
  * These arrays are automatically built from the regex in twemoji.js - if they need to be updated,
- * you should update the regex there, then run the `grunt precommit:emoji` job.
+ * you should update the regex there, then run the `npm run grunt precommit:emoji` job.
  *
  * @since 4.9.0
  * @access private
diff --git a/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js b/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js
index 6a28ae779d..b34c007379 100644
--- a/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js
+++ b/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js
@@ -1 +1 @@
-!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e(t.WHATWGFetch={})}(this,function(a){"use strict";var r="URLSearchParams"in self,o="Symbol"in self&&"iterator"in Symbol,h="FileReader"in self&&"Blob"in self&&function(){try{return new Blob,!0}catch(t){return!1}}(),n="FormData"in self,i="ArrayBuffer"in self;if(i)var e=["[object Int8Array]","[object Uint8Array]","[object Uint8ClampedArray]","[object Int16Array]","[object Uint16Array]","[object Int32Array]","[object Uint32Array]","[object Float32Array]","[object Float64Array]"],s=ArrayBuffer.isView||function(t){return t&&-1<e.indexOf(Object.prototype.toString.call(t))};function u(t){if("string"!=typeof t&&(t=String(t)),/[^a-z0-9\-#$%&'*+.^_`|~]/i.test(t))throw new TypeError("Invalid character in header field name");return t.toLowerCase()}function f(t){return"string"!=typeof t&&(t=String(t)),t}function t(e){var t={next:function(){var 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d(e.headers),this.url=e.url||"",this._initBody(t)}w.prototype.clone=function(){return new w(this,{body:this._bodyInit})},b.call(w.prototype),b.call(E.prototype),E.prototype.clone=function(){return new E(this._bodyInit,{status:this.status,statusText:this.statusText,headers:new d(this.headers),url:this.url})},E.error=function(){var t=new E(null,{status:0,statusText:""});return t.type="error",t};var A=[301,302,303,307,308];E.redirect=function(t,e){if(-1===A.indexOf(e))throw new RangeError("Invalid status code");return new E(null,{status:e,headers:{location:t}})},a.DOMException=self.DOMException;try{new a.DOMException}catch(t){a.DOMException=function(t,e){this.message=t,this.name=e;var r=Error(t);this.stack=r.stack},a.DOMException.prototype=Object.create(Error.prototype),a.DOMException.prototype.constructor=a.DOMException}function _(n,s){return new Promise(function(o,t){var e=new w(n,s);if(e.signal&&e.signal.aborted)return t(new a.DOMException("Aborted","AbortError"));var i=new XMLHttpRequest;function r(){i.abort()}i.onload=function(){var t,n,e={status:i.status,statusText:i.statusText,headers:(t=i.getAllResponseHeaders()||"",n=new d,t.replace(/\r?\n[\t ]+/g," ").split(/\r?\n/).forEach(function(t){var e=t.split(":"),r=e.shift().trim();if(r){var o=e.join(":").trim();n.append(r,o)}}),n)};e.url="responseURL"in i?i.responseURL:e.headers.get("X-Request-URL");var r="response"in i?i.response:i.responseText;o(new E(r,e))},i.onerror=function(){t(new TypeError("Network request failed"))},i.ontimeout=function(){t(new TypeError("Network request failed"))},i.onabort=function(){t(new a.DOMException("Aborted","AbortError"))},i.open(e.method,e.url,!0),"include"===e.credentials?i.withCredentials=!0:"omit"===e.credentials&&(i.withCredentials=!1),"responseType"in i&&h&&(i.responseType="blob"),e.headers.forEach(function(t,e){i.setRequestHeader(e,t)}),e.signal&&(e.signal.addEventListener("abort",r),i.onreadystatechange=function(){4===i.readyState&&e.signal.removeEventListener("abort",r)}),i.send(void 0===e._bodyInit?null:e._bodyInit)})}_.polyfill=!0,self.fetch||(self.fetch=_,self.Headers=d,self.Request=w,self.Response=E),a.Headers=d,a.Request=w,a.Response=E,a.fetch=_,Object.defineProperty(a,"__esModule",{value:!0})});
\ No newline at end of file
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e(t.WHATWGFetch={})}(this,function(a){"use strict";var e="URLSearchParams"in self,r="Symbol"in self&&"iterator"in Symbol,h="FileReader"in self&&"Blob"in self&&function(){try{return new Blob,!0}catch(t){return!1}}(),o="FormData"in self,n="ArrayBuffer"in self;if(n)var i=["[object Int8Array]","[object Uint8Array]","[object Uint8ClampedArray]","[object Int16Array]","[object Uint16Array]","[object Int32Array]","[object Uint32Array]","[object Float32Array]","[object Float64Array]"],s=ArrayBuffer.isView||function(t){return t&&-1<i.indexOf(Object.prototype.toString.call(t))};function u(t){if("string"!=typeof t&&(t=String(t)),/[^a-z0-9\-#$%&'*+.^_`|~]/i.test(t))throw new TypeError("Invalid character in header field name");return t.toLowerCase()}function f(t){return"string"!=typeof t&&(t=String(t)),t}function t(e){var t={next:function(){var 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diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8b1a917949..fe0cf8a36b 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45444';
+$wp_version = '5.3-alpha-45445';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.