Incorrect column position calculation for literals containing symbols

[Anmol202005]

Follow up of: #53

public class test {
  
    private long minLong = -9223372036854775808l;    //false negative
    private Long negativeLong = -5678l;    //false negative
}

Checkstyle does not account for symbol characters(+, -) when calculating column positions of a literal,
therefore in the upperEll recipe Column positions are off by the number of symbols present in literal values

Fix: Updated method to count and add symbol characters to the base column offset calculation.

[Anmol202005]

@rdiachenko kindly close.

[rdiachenko]

Resolved by #56