Composer always shows an update is available

[devicenull]

$ composer show kwn/php-rdkafka-stubs --latest
name     : kwn/php-rdkafka-stubs
descrip. : Rdkafka extension stubs for your IDE
keywords :
versions : * v2.2.1
latest   : 0.0.1
type     : library
license  : MIT License (MIT) (OSI approved) https://spdx.org/licenses/MIT.html#licenseText
homepage :
source   : [git] https://github.com/kwn/php-rdkafka-stubs.git 23b865d6b3e8fe1f080aa7371dc1da3339361996
dist     : [zip] https://api.github.com/repos/kwn/php-rdkafka-stubs/zipball/23b865d6b3e8fe1f080aa7371dc1da3339361996 23b865d6b3e8fe1f080aa7371dc1da3339361996
path     : /home/sites/vultr.com/vendor/kwn/php-rdkafka-stubs
names    : kwn/php-rdkafka-stubs

support
issues : https://github.com/kwn/php-rdkafka-stubs/issues
source : https://github.com/kwn/php-rdkafka-stubs/tree/v2.2.1

requires
ext-rdkafka >=4.0

requires (dev)
phpunit/phpunit ^8.2.4

Composer always shows that 0.0.1 is the latest version, even though I have v2.2.1 installed. I think switching between 0.x and v0.x is what's causing the issue