ui5 tooling v3

[mauriciolauffer]

ui5 tooling v3 + better eslint rules.

I was going to remove almost everything from eslint, but I thought it'd be simpler to just make minor changes.

This'd be the proposed rules:

root: true
extends:
  - eslint:recommended
env:
  browser: true
  es6: true
  jquery: true
  qunit: true
globals:
  sap: true
  sinon: true
rules:
  no-var: error

[d3xter666]

Overall, I'd assume that those replacements of var should cover the scope of the whole application and also most if not all of them should be replaced by const instead of let.

For the eslint rules, I'd request collesgues to give their feedback

[d3xter666]

All of those let declarations should be const instead

[mauriciolauffer]

I've just applied eslint --fix, I haven't manually changed the declarations...

[d3xter666]

Are we looking for the latest schema version here?
Then it should be 1.57.0. Please, check the spec here: https://raw.githubusercontent.com/SAP/ui5-manifest/master/schema.json

[flovogt]

@mauriciolauffer Thanks a lot for this PR. We're planning to transform this sample app to more modern ECMAScript syntax and will consider this PR also when doing the transformation.