Installer script fails if host has php 8.0

[kirtangajjar]

Here's the partial log. This info is enough to pinpoint the bug.

2020-12-22 12:14:54 (37.9 MB/s) - ‘/usr/local/bin/ee’ saved [6120310/6120310]

-----> Pulling EasyEngine docker images
-----> Pulling EasyEngine docker images
PHP Fatal error:  Uncaught Error: Attempt to modify property "site_types" on null in phar:///usr/local/bin/ee/vendor/easyengine/site-command/src/S
ite_Command.php:46
Stack trace:
#0 phar:///usr/local/bin/ee/vendor/easyengine/site-command/site-command.php(36): Site_Command::add_site_type()
#1 phar:///usr/local/bin/ee/vendor/composer/autoload_real.php(73): require('...')
#2 phar:///usr/local/bin/ee/vendor/composer/autoload_real.php(63): composerRequirea33f4a6479723a19537fd4af2a7c834a()
#3 phar:///usr/local/bin/ee/vendor/autoload.php(7): ComposerAutoloaderInita33f4a6479723a19537fd4af2a7c834a::getLoader()
#4 phar:///usr/local/bin/ee/php/EE/Bootstrap/AutoloaderStep.php(42): require('...')
#5 phar:///usr/local/bin/ee/php/bootstrap.php(75): EE\Bootstrap\AutoloaderStep->process()
#6 phar:///usr/local/bin/ee/php/init-ee.php(27): EE\bootstrap()
#7 phar:///usr/local/bin/ee/php/boot-phar.php(8): include('...')
#8 /usr/local/bin/ee(5): include('...')
#9 {main}
  thrown in phar:///usr/local/bin/ee/vendor/easyengine/site-command/src/Site_Command.php on line 46