ensure attachments are json-encoded RE: https://github.com/slackhq/node-slack-client/issues/12#issuecomment-104754740
ensure attachments are json-encoded RE: https://github.com/slackhq/node-slack-client/issues/12#issuecomment-104754740

techartorg/slacker,STANAPO/slacker,wkentaro/slacker,dastergon/slacker,wasabi0522/slacker,BetterWorks/slacker,os/slacker,olasitarska/slacker,kashyap32/slacker,hreeder/slacker