fix(isMobilePhone): pt-BR locale

• correct regex for pt-br phone numbers

• changed tests for pt-BR mobile phone number validation

• Removed valid number from invalid list of pt-br phones

• Numbers with 9 digits, second digit being 1-9

• Updated tests to check on pt-br phone numbers starting with 9 and followed by 1-9

• Updated tests to comply with new phone numbers

Fix regex for pt-BR, now accepting number 1 after number 9 for mobile phone numbers

valid and invalid test values updated due fix on isMobilePhone.js for pt-BR