Describe the bug

The way to require a package with an alias, as the Drupal 9 upgrade documentation tells you to do, is composer require "drupal/core:9.0.0 as 8.9.0".

However with ddev composer ... this results in an error:

$ ddev composer require "drupal/core:9.0.0 as 8.9.0" --no-update

                              
  [InvalidArgumentException]  
  Could not find package as.  
                              
  Did you mean one of these?  
      ext-hash                
      ramsey/uuid             
      drupal/zen              
      drupal/cog              
      drupal/bfd              
                              

require [--dev] [--prefer-source] [--prefer-dist] [--fixed] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] [<packages>]...

composer [require drupal/core:9.0.0 as 8.9.0 --no-update] failed, composer command failed: exit status 1. stderr= 

It seems that ddev composer is stripping out the quotes, which causes "as" to be interpreted as a package name.

To Reproduce
Steps to reproduce the behavior:

1. Have a standard composer-based Drupal 8 ddev installation.
2. Run ddev composer require "drupal/core:9.0.0 as 8.9.0" --no-update

Expected behavior
I expect composer to add "drupal/core:9.0.0 as 8.9.0" as a requirement in composer.json.

Version and configuration information (please complete the following information):

• Host computer OS and Version: macOS Catalina
• Docker Desktop version: 2.4.0.0
• ddev version information:

  DDEV-Local version      v1.14.2                                
  commit                  v1.14.2                                
  db                      drud/ddev-dbserver-mariadb-10.2:v1.14.1
  dba                     phpmyadmin/phpmyadmin:5                
  ddev-ssh-agent          drud/ddev-ssh-agent:v1.14.0            
  docker                  19.03.13                               
  docker-compose          1.27.4                                 
  os                      darwin                                 
  router                  drud/ddev-router:v1.14.0               
  web                     drud/ddev-webserver:v1.14.2 
  

• config.yaml contents for the misbehaving project

  type: drupal8
  docroot: htdocs
  php_version: "7.3"
  webserver_type: nginx-fpm
  router_http_port: "80"
  router_https_port: "443"
  xdebug_enabled: false
  additional_hostnames: []
  additional_fqdns: []
  mariadb_version: "10.3"
  provider: default
  project_tld: lmn.gr
  use_dns_when_possible: true
  timezone: Europe/Amsterdam
  disable_settings_management: true
  

• Do you have any custom configuration (nginx, php, mysql) in the .ddev folder? If so, have you tried without them?
  Nothing that I'm aware of. Don't think it would matter for this issue anyway.

PS
I realize I'm not on the latest ddev version, but I read the release notes and didn't see anything that would have fixed this meanwhile.