(isMobilePhone): es-CO locale, passing landlines as valid

[jhoalx]

Describe the bug
the regex in this commit is passing landlines as valid.
isn't the function isMobilePhone() intended to validate Mobile phones Only?

please refer to
Landlines: https://en.wikipedia.org/wiki/Telephone_numbers_in_Colombia#Landline_service
Mobile: https://en.wikipedia.org/wiki/Telephone_numbers_in_Colombia#Mobile_service

Examples
0698345 and 9821235 passes as valid, are (apparently) landlines, not mobile

Additional context
Validator.js version: 13.5.2 (imported in express-validator 6.10.0)
Node.js version: 14.15.4
OS platform: Arch Linux

[tux-tn]

@jhoalx Can you check the raised PR and confirm that the new regex is fixing the problem? I didn't find many sources concerning Provider prefix, i followed the wikipedia article explanation.

[jhoalx]

@jhoalx Can you check the raised PR and confirm that the new regex is fixing the problem? I didn't find many sources concerning Provider prefix, i followed the wikipedia article explanation.

Done: here