fix(range-picker): correct type for min, max, filter properties

[katebatura]

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Short description of what this resolves:

Closes #2700

BREAKING CHANGE:
NbRangepickerComponent's min, max properties are expecting Date (or moment if using moment adapter) type. filter function parameter also corrected to Date. NbDatepicker now a has second generic D to use for min, max, and filter arguments. It should be set to Date or moment type.