Update juju/txn dependency
Update juju/txn dependency

bac/juju,frankban/juju,alesstimec/juju,anastasiamac/juju,mjs/juju,marcmolla/juju,mikemccracken/juju,anastasiamac/juju,ericsnowcurrently/juju,AdamIsrael/juju,marcmolla/juju,waigani/juju,bac/juju,marcmolla/juju,frankban/juju,alesstimec/juju,bac/juju,reedobrien/juju,anastasiamac/juju,mjs/juju,waigani/juju,ericsnowcurrently/juju,anastasiamac/juju,mjs/juju,bac/juju,AdamIsrael/juju,mjs/juju,mikemccracken/juju,mikemccracken/juju,alesstimec/juju,reedobrien/juju,ericsnowcurrently/juju,mikemccracken/juju,bac/juju,AdamIsrael/juju,anastasiamac/juju,AdamIsrael/juju,ericsnowcurrently/juju,marcmolla/juju,waigani/juju,reedobrien/juju,reedobrien/juju,mikemccracken/juju,ericsnowcurrently/juju,frankban/juju,mjs/juju,waigani/juju,mjs/juju,marcmolla/juju,alesstimec/juju,mjs/juju,frankban/juju,alesstimec/juju,reedobrien/juju,frankban/juju