[-] Technical - Upgrade to babel 7 stable

[rap2hpoutre]

Pull Request checklist:

• Write an explicit title for the Pull Request
• Write changes made in the CHANGELOG.md
• Test manually the implemented changes
• Review my own code (indentation, syntax, style, simplicity, readability)
• Wonder if you can improve the existing code

[rap2hpoutre]

Broken. See:

• Template string failing with Cannot read property 'range' of null babel/babel-eslint#799
• Cannot read property 'range' of null babel/babel-eslint#681
• TypeError: Cannot read property 'range' of null from template-curly-spacing babel/babel-eslint#530

Edit: fixed with yarn upgrade (we use exact versions in dependencies, it should be ≈safe).

[VincentMolinie]

I guess the yarn.lock is not up to date too

[rap2hpoutre]

It seems OK

➜  forest-express-mongoose git:(upgrade/babel-7) yarn
yarn install v1.19.1
[1/4] 🔍  Resolving packages...
success Already up-to-date.
✨  Done in 0.32s.
➜  forest-express-mongoose git:(upgrade/babel-7) git status
On branch upgrade/babel-7
Your branch is up to date with 'origin/upgrade/babel-7'.

nothing to commit, working tree clean

[rap2hpoutre]

Deleted node_modules, it has been updated 🤔