bug: handle packages using v format inconsistently

[gerpetto]

In some packages, I found that the tags are not always consistent.
For example: https://github.com/lerna/lerna/releases - they start without the v format but then on 7.1.2, they switch to using v format. Right now we are not handling this edge case since we only check for the first tag what convention is used and use the same for the rest of the tags