Restrict input values

[liamhuber]

To a subset of JSONifiable types, per discussion in #164.

[liamhuber]

@jan-janssen, the quantum espresso demo holds input lists of int and float. It looks to me like these should be replaced by kmesh(kx: int, ky:int, kz:int) and range(start: float, end: float, steps: int) (or similar) nodes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[jan-janssen]

@liamhuber I am open to clarifying an implicit restriction that we practically already used but did not enforce so far. But I am a bit more reluctant to modify the examples after publication as I feel this would break backwards compatibility. This is would require a 2.0 release.

[liamhuber]

Better to use #167 as the starting point if you're going to do this, the test suite is more complete

[jan-janssen]

Better to use #167 as the starting point if you're going to do this, the test suite is more complete

I am happy to merge the additional tests in #167 as well.

[liamhuber]

Better to use #167 as the starting point if you're going to do this, the test suite is more complete

I am happy to merge the additional tests in #167 as well.

I disapprove of this change, but if you're going to make it anyway then the extra tests are a positive.