Update leaky pipes post

[matt-dray]

Post: https://www.rostrum.blog/2019/04/07/fix-leaky-pipes/

{boomer} 'explodes' intermediate objects: https://github.com/moodymudskipper/boomer

Use a tip box at the top of the post to say that the post has been/will be updated as new tools appear.

[matt-dray]

And {mario} https://github.com/seankross/mario

[matt-dray]

Added a note box to the top of the post for now. I think I need to run some older examples in an earlier version of R to get them to work. Don't have time to sort it all out.

[matt-dray]

{hippie} has a function to do this too: https://github.com/crew102/hippie