bump rdoc to v5.0
bump rdoc to v5.0

alex-kovac/jekyll,xiebinhqy/jklly_china,tomjohnson1492/jekyll,jaybe-jekyll/jekyll,chrisfinazzo/jekyll,x-way/jekyll,chrisfinazzo/jekyll,x-way/jekyll,tillgrallert/jekyll,getandpost/jekyll.github.io,rlugojr/jekyll,tomjohnson1492/jekyll,jekyll/jekyll,rasa2011/rasa2011.github.io,rlugojr/jekyll,chrisfinazzo/jekyll,rasa2011/rasa2011.github.io,ryanshaw/jekyll,rasa2011/rasa2011.github.io,tomjohnson1492/jekyll,tillgrallert/jekyll,gencer/jekyll,tillgrallert/jekyll,gencer/jekyll,jekyll/jekyll,ryanshaw/jekyll,tomjohnson1492/jekyll,tomjohnson1492/jekyll,x-way/jekyll,xiebinhqy/jklly_china,jekyll/jekyll,tillgrallert/jekyll,xiebinhqy/jklly_china,rlugojr/jekyll,chrisfinazzo/jekyll,getandpost/jekyll.github.io,Strangehill/jekyll,alex-kovac/jekyll,x-way/jekyll,tillgrallert/jekyll,jaybe-jekyll/jekyll,jaybe-jekyll/jekyll,gencer/jekyll,gencer/jekyll,jaybe-jekyll/jekyll,Strangehill/jekyll,Strangehill/jekyll,alex-kovac/jekyll,alex-kovac/jekyll,fulldecent/jekyll,Strangehill/jekyll,rlugojr/jekyll,xiebinhqy/jklly_china,alex-kovac/jekyll,getandpost/jekyll.github.io,ryanshaw/jekyll,ryanshaw/jekyll,fulldecent/jekyll,gencer/jekyll,jekyll/jekyll,Strangehill/jekyll,yhironaka/yhironaka.github.io,fulldecent/jekyll,fulldecent/jekyll