New reporter, global config, environment variables

🆕 Features

• Deprecate --reporter CLI arg and support environment variables for config instead. Ex: run another reporter with:

  LOLTEST_REPORTER=tap loltest

  Prefix config values with LOLTEST_ and make them uppercase with underscores as separators. testDir thus becomes LOLTEST_TEST_DIR.
• Add new loltest2 reporter 💅
• Support global .json config file at $HOME/.loltest:

  {"reporter": "loltest2"}

  reporter and testDir are the currently supported config keys.

loltest2 reporter output