Disallow leading zeroes in UNSIGNED_INT

[nichtich]

Change

UNSIGNED_INT
    : [0-9]+
    ;

to

UNSIGNED_INT
    : "0" | [1-9] [0-9]*
    ;

[lszeremeta]

Hi, thank you for your suggestion.

You are right. UNSIGNED_INT in YARS-PG is used for cardinalities, datatype precision, and datatype scale. Leading zeros are not needed here, and the allowance to add them may introduce confusion.

I fixed it in 1dea9e3, and I released the YARS-PG 5.0.0 based on semantic versioning ("incompatible API changes").