Pager: use TerminalInfo API for `::page_size`
Pager: use TerminalInfo API for `::page_size`

Fix issue #829 (NoMethodError: undefined method `winsize'
for #<IO:<STDOUT>>, The Same Error as #549 But On The Latest Version
(0.9.11.4))

tdg5/pry,bronzdoc/pry,ooohiroyukiooo/pry,geoffreylitt/pry,josue804/debunker,richo/pry,caporta/pry,pvdb/pry,jasonm23/pry,scalixte-mdsol/pry,sferik/pry,printercu/pry,geoffreylitt/pry,nju520/pry,tdg5/pry,85x14/pry,deivid-rodriguez/pry,nju520/pry,printercu/pry,icebreaker/pry,ooohiroyukiooo/pry,jasnow/pry,ngpestelos/pry,raeno/pry,gfvcastro/pry,ooohiroyukiooo/pry,caporta/pry,tdg5/pry,jasnow/pry,raeno/pry,jasonm23/pry,85x14/pry,shockone/pry,josue804/debunker,jasonm23/pry,caporta/pry,nju520/pry,sideci-sample/sideci-sample-pry,sferik/pry,scalixte-mdsol/pry,85x14/pry,bronzdoc/pry,jasnow/pry,ngpestelos/pry,shockone/pry,shockone/pry,scalixte-mdsol/pry,pvdb/pry,raeno/pry,icebreaker/pry,gfvcastro/pry