Zend certified PHP/Magento developer

Upgrade from 2.2.4 to 2.3.7

I tried to upgrade Magento from 2.2.4 to 2.3.7
This is what i tried

composer require magento/composer-root-update-plugin=~1.0 --no-update
composer update --ignore-platform-reqs
cp composer.json composer.json.bak
composer remove magento/product-community-edition --no-update
composer require magento/product-community-edition 2.4.1 --no-update
composer update --ignore-platform-reqs

I got this errors

 Problem 1
- magento/project-community-edition 2.2.1 requires magento/product-community-edition 2.2.1 -> satisfiable by magento/product-community-edition[2.2.1] but these conflict with your requirements or minimum-stability.
- magento/project-community-edition 2.2.1 requires magento/product-community-edition 2.2.1 -> satisfiable by magento/product-community-edition[2.2.1] but these conflict with your requirements or minimum-stability.
- magento/product-community-edition 2.3.7 requires temando/module-shipping 2.0.0 -> satisfiable by temando/module-shipping[2.0.0].
- magento/product-community-edition 2.3.7 requires temando/module-shipping 2.0.0 -> satisfiable by temando/module-shipping[2.0.0].
- temando/module-shipping 2.0.0 requires temando/module-shipping-remover 1.0.0 -> satisfiable by temando/module-shipping-remover[1.0.0].
- temando/module-shipping 2.0.0 requires temando/module-shipping-remover 1.0.0 -> satisfiable by temando/module-shipping-remover[1.0.0].
- don't install temando/module-shipping-remover 1.0.0|remove magento/project-community-edition 2.2.1
- don't install temando/module-shipping-remover 1.0.0|remove magento/project-community-edition 2.2.1
- Installation request for magento/project-community-edition 2.2.1 -> satisfiable by magento/project-community-edition[2.2.1].
- Installation request for magento/product-community-edition 2.3.7 -> satisfiable by magento/product-community-edition[2.3.7].

So i tried to change version in composer.json in the global scope

"version": "2.3.7",

Composer update

Now i got those errors

Problem 1
- Conclusion: don't install magento/product-community-edition 2.3.7
- Conclusion: remove zendframework/zend-mail 2.6.2
- Conclusion: don't install zendframework/zend-mail 2.6.2
- Installation request for magento/product-community-edition 2.3.7 -> satisfiable by magento/product-community-edition[2.3.7].
- Conclusion: don't install zendframework/zend-mail 2.6.1
- magento/product-community-edition 2.3.7 requires laminas/laminas-mail ^2.9.0 -> satisfiable by laminas/laminas-mail[2.10.0, 2.10.1, 2.10.2, 2.11.0, 2.11.1, 2.12.0, 2.12.1, 2.12.2, 2.12.3, 2.12.4, 2.12.5, 2.13.0, 2.13.1, 2.14.0, 2.14.1, 2.9.0].
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.10.0
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.10.1
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.10.2
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.11.0
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.11.1
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.12.0
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.12.1
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.12.2
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.12.3
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.12.4
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.12.5
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.13.0
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.13.1
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.14.0
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.14.1
- don't install zendframework/zend-mail 2.6.0|don't install laminas/laminas-mail 2.9.0
- Installation request for zendframework/zend-mail ~2.6.0 -> satisfiable by zendframework/zend-mail[2.6.0, 2.6.1, 2.6.2].