added new envs to .travis.yml
added new envs to .travis.yml

wormeyman/slack-wordpress,erayalakese/slack-wordpress,Stayallive/slack-wordpress,champsupertramp/slack-wordpress,erayalakese/slack-wordpress,josephfusco/slack-wordpress,josephfusco/slack-wordpress,erayalakese/slack-wordpress,josephfusco/slack-wordpress,wormeyman/slack-wordpress,wormeyman/slack-wordpress,Stayallive/slack-wordpress,champsupertramp/slack-wordpress,champsupertramp/slack-wordpress,Stayallive/slack-wordpress