fix(adjust): add tuple kind

[ikatyang]

Fixes #273

This PR adds tuple support for R.adjust, but it's disabled by default since TS may pick wrong kind for list, you have to specify kind manually, e.g. R.adjust<"111", "tuple"> or other types satisfied the tuple kind.

NOTE: the tuple version of R.adjust only supports fn: (x: T) => T, does not support fn: (x: T) => U since AFAIK there's no way to "adjust" a tuple type.

// @dts-jest:pass:snap -> [string, number]
R.adjust<'111', 'tuple'>()(string_to_string, 0, string_number_tuple);
// @dts-jest:fail:snap -> Argument of type 'Morphism<string, string>' is not assignable to parameter of type 'Morphism<number, number>'.
R.adjust<'111', 'tuple'>()(string_to_string, 1, string_number_tuple);

import * as R from 'ramda';

export const mapKeys = R.curry(
- (fn: ???, obj: { [k: string]: any } | { [k: number]: any }) =>
+ (fn: (key: string) => string, obj: { [k: string]: any } | { [k: number]: any }) =>
    R.fromPairs(
      R.map(
-       R.adjust(fn, 0), // <--- Error: tried typings for `adjust`
+       R.adjust<0, [string, any]>(fn, 0),
        R.toPairs(obj) // Fixed by referencing typings of `toPairs`
      )
    )
);

[KiaraGrouwstra]

AFAIK there's no way to "adjust" a tuple type

Yeah, that needs microsoft/TypeScript#17884. Changes LGTM.