Index: composer.json
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- composer.json	(revision 45273)
+++ composer.json	(date 1557778391000)
@@ -9,10 +9,41 @@
 	"support": {
 		"issues": "https://core.trac.wordpress.org/"
 	},
+	"require": {
+		"paragonie/sodium_compat": "1.10.0",
+		"paragonie/random_compat": "2.0.18",
+		"rmccue/requests": "1.7.0",
+		"pomo/pomo": "1.1.0",
+		"simplepie/simplepie": "1.3.1",
+		"pear/text_diff":  "1.2.2",
+		"james-heinrich/getid3": "1.9.17",
+		"mnsami/composer-custom-directory-installer": "1.1.*"
+	},
 	"require-dev": {
 		"dealerdirect/phpcodesniffer-composer-installer": "~0.5.0",
 		"wp-coding-standards/wpcs": "~2.0.0"
 	},
+	"extra": {
+		"installer-paths": {
+			"src/wp-includes/{$name}/": [
+				"paragonie/sodium_compat",
+				"paragonie/random_compat",
+				"pomo/pomo"
+			],
+			"src/wp-includes/SimplePie/": [
+				"simplepie/simplepie"
+			],
+			"src/wp-includes/Requests/": [
+				"rmccue/requests"
+			],
+			"src/wp-includes/Text/": [
+				"pear/text_diff"
+			],
+			"src/wp-includes/ID3/": [
+				"james-heinrich/getid3"
+			]
+		}
+	},
 	"scripts": {
 		"format": "phpcbf --standard=phpcs.xml.dist --report-summary --report-source",
 		"lint": "phpcs --standard=phpcs.xml.dist --report-summary --report-source"