Jan 7 (Reuters) - JPMorgan Chase and Apple on Wednesday announced a deal under which the bank will become the new issuer of the ​Apple Card, replacing Goldman Sachs, further expanding the biggest U.S. bank's credit ‌card franchise. The deal would cement JPMorgan's position in the credit cards segment and mark another win for ‌CEO Jamie Dimon, under whose leadership the bank has become a dominant force in retail and investment banking. The move is estimated to bring over $20 billion in card balances to C ...