Update .eslintrc to the 2.0.0+ format
Update .eslintrc to the 2.0.0+ format

Certain config options have changed in the latest version of eslint,
notably the “ecmaFeatures”. These changes update the file to match
http://eslint.org/docs/user-guide/migrating-to-2.0.0#language-options

Signed-off-by: Victor Porof <7d8eebacd0931807085fa6b9af29638ed74e0886@mozilla.com>

jsantell/tofino,mozilla/tofino,AAorris/tofino,mozilla/tofino,bgrins/tofino,AAorris/tofino,AAorris/tofino,jsantell/tofino,bgrins/tofino,bgrins/tofino,jsantell/tofino,bgrins/tofino,jsantell/tofino,victorporof/tofino,linclark/tofino,linclark/tofino,victorporof/tofino,linclark/tofino,mozilla/tofino,mozilla/tofino