dec2base() is 53-bit limited by double. It is not uint64-ready

Reported by Samuel GOUGEON (@sgougeon)

BUG DESCRIPTION:
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uint64 integers have a better relative accuracy than decimal numbers whose mantissa is encoded on only 53 bits.
For all integer processing functions, uint64 (or int64 for signed values) should be the basic, a-posteriori downgraded by any required conversion into double.
This is the case for dec2base() that presently accepts only doubles.
It was fine when all encoded integers had a less accurate mantissa. It is no longer the case with uint64.

--> dec2base(uint64(2^54+1), 2)  // inappropriate error message:
dec2base: Wrong type for input argument #1: A matrix of integer value expected.

--> dec2base(double(uint64(2^54+1)), 2)
dec2base: Wrong value for input argument #1: Must be between 0 and 2^52.

ERROR LOG:
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See above

HOW TO REPRODUCE THE BUG:
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dec2base(uint64(2^54+1), 2)
dec2base(double(uint64(2^54+1)), 2)

OTHER INFORMATION:
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This impedes all functions using dec2base: dec2bin, dec2oct, dec2hex, etc