Fix the baseline

[PalumboN]

I changed the baseline to:

baseline: spec

    <baseline>
    spec for: #common do: [
        spec
            package: 'Coypu'
            with: [ spec repository: 'github://lucretiomsp/Coypu' ];
            package: 'Phausto'
            with: [ spec repository: 'github://lucretiomsp/phausto' ];
            package: 'CoypuIDE' with: [ spec repository: 'github://lucretiomsp/CoypuIDE'] .

        "Internal dependencies"
        spec package: 'MasterLu' ]

Changes:

• I updated the links to the form github://<user>/<repo>
• I removed spec requires: 'Toplo' (it must be in CoypuIDE)
• I changed the dependency of pharo-graphics/CoypuIDE to lucretiomsp/CoypuIDE because it needs the changes in this PR

---

This almost works: just Block is missing, but it is a dependency of Toplo that is a dependency of CoypuIDE.

But, if you already have Block loaded in the image, it should work.

Tested in Pharo 12

[lucretiomsp]

I am changing the baseline and check the behaviour on a fresh image