Update changelog for release 0.12.7
Update changelog for release 0.12.7

carragom/knex,WaltRock/knex,noodle/knex,tgriesser/knex,CorvusCorrax/knex,tgriesser/knex,abegines/knex,WaltRock/knex,CorvusCorrax/knex,abegines/knex,wubzz/knex,tgriesser/knex,wubzz/knex,noodle/knex,carragom/knex