Install script should display the changelog for all versions between the currently installed one and the last one

[EtienneM]

The output of the install script (dists/install.sh) is something like:

[...]
 /!\   Scalingo client is already installed (version 1.43.1)
        Do you want to replace it with version 1.43.3? [Y/n]
[...]
-----> Here's what's new in this version:

Changelog of the version 1.43.3

[...]


**Full Changelog**: https://github.com/Scalingo/cli/compare/1.43.2...1.43.3
[...]

But if my current version is 1.43.1, I expect the changelog to contain also what changed in 1.43.2. And the link at the end to be https://github.com/Scalingo/cli/compare/1.43.1...1.43.3