[TASK] Update readme and composer.json

Update composer.json with latest best practices
in particular remove the legacy TER composer repository.

Author: helhum

README.md

@@ -9,7 +9,7 @@ Get going quickly with TYPO3 CMS.
 
 ## Quickstart
 
-* `composer create-project typo3/cms-base-distribution project-name ^9`
+* `composer create-project typo3/cms-base-distribution project-name ^10`
 * `cd project-name`
 
 **Setup:**
@@ -24,7 +24,7 @@ php vendor/bin/typo3cms install:setup
 **Setup unattended (optional):**
 
 If you're a more advanced user, you might want to leverage the unattended installation.
-To do this, you need to execute the following command and substite the arguments
+To do this, you need to execute the following command and substitute the arguments
 with your own environment configuration.
 
 ```

composer.json

@@ -1,38 +1,35 @@
 {
-	"repositories": [
-		{ "type": "composer", "url": "https://composer.typo3.org/" }
-	],
 	"name": "typo3/cms-base-distribution",
 	"description" : "TYPO3 CMS Base Distribution",
 	"license": "GPL-2.0-or-later",
 	"config": {
 		"platform": {
 			"php": "7.2"
-		}
+		},
+		"sort-packages": true
 	},
 	"require": {
+		"typo3/cms-about": "dev-master",
 		"typo3/cms-backend": "dev-master",
+		"typo3/cms-belog": "dev-master",
+		"typo3/cms-beuser": "dev-master",
 		"typo3/cms-core": "dev-master",
+		"typo3/cms-dashboard": "dev-master",
 		"typo3/cms-extbase": "dev-master",
 		"typo3/cms-extensionmanager": "dev-master",
+		"typo3/cms-felogin": "dev-master",
 		"typo3/cms-filelist": "dev-master",
 		"typo3/cms-fluid": "dev-master",
-		"typo3/cms-frontend": "dev-master",
-		"typo3/cms-install": "dev-master",
-		"typo3/cms-recordlist": "dev-master",
-
-		"typo3/cms-about": "dev-master",
-		"typo3/cms-belog": "dev-master",
-		"typo3/cms-beuser": "dev-master",
-		"typo3/cms-dashboard": "dev-master",
-		"typo3/cms-felogin": "dev-master",
 		"typo3/cms-fluid-styled-content": "dev-master",
 		"typo3/cms-form": "dev-master",
+		"typo3/cms-frontend": "dev-master",
 		"typo3/cms-impexp": "dev-master",
 		"typo3/cms-info": "dev-master",
+		"typo3/cms-install": "dev-master",
+		"typo3/cms-recordlist": "dev-master",
 		"typo3/cms-rte-ckeditor": "dev-master",
-		"typo3/cms-setup": "dev-master",
 		"typo3/cms-seo": "dev-master",
+		"typo3/cms-setup": "dev-master",
 		"typo3/cms-sys-note": "dev-master",
 		"typo3/cms-t3editor": "dev-master",
 		"typo3/cms-tstemplate": "dev-master",