Upgrade module-vault dependency to version 100.2.1

[mysil2]

I have upgraded Magento the the latest version, but I'd love to test your Stripe module, and I ran:
composer require pmclain/module-stripe

Got the following error:

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Installation request for pmclain/module-stripe ^0.0.4 -> satisfiable by pmclain/module-stripe[0.0.4].
- Conclusion: remove magento/module-vault 100.2.1
- Conclusion: don't install magento/module-vault 100.2.1
- pmclain/module-stripe 0.0.4 requires magento/module-vault 100.1.* -> satisfiable by magento/module-vault[100.1.0-rc1, 100.1.0-rc2, 100.1.0-rc3, 100.1.0, 100.1.1].
- Can only install one of: magento/module-vault[100.2.1, 100.1.0-rc1].
- Can only install one of: magento/module-vault[100.2.1, 100.1.0-rc2].
- Can only install one of: magento/module-vault[100.2.1, 100.1.0-rc3].
- Can only install one of: magento/module-vault[100.2.1, 100.1.0].
- Can only install one of: magento/module-vault[100.2.1, 100.1.1].
- Installation request for magento/module-vault (locked at 100.2.1) -> satisfiable by magento/module-vault[100.2.1].

Any chance it'll work just changing the version in composer.json, or is it actually not compatible as it stands?

I see that the paypal module needs version 100.2.1, I'm not planning to use paypal but I'm new to Magento and have not found a solution for how to remove the paypal module in order to downgrade the module-vault.

[pmclain]

There's a very good chance I borked the composer.json. Can you confirm the Magento version and I'll test it out?

[mysil2]

Admin interface says Magento ver. 2.1.7.

[pmclain]

Thanks. I'll get a fresh install of 2.1.7 tonight and give it a try.

[pmclain]

I had failed to add the current version of magento/module-vault to composer.json. This has been corrected in the v0.0.5 release. You may need to clear your composer cache or explicitly state the version when attempting to install.