v8.6.1

####8.6.1####

• added public parameter, so tests can be made Public on Sauce Labs
• when retrying a test, browser name and test url are output to stdout
• default build number added when running tests locally
• update Sauce Connect to v4.3.7\
• updated npm dependencies
• fixed a bug where YUI or Qunit tests were detected as Passed, when they actually failed