v1.2.1

• chore(package): use eslint (b147569)
• chore(release): 1.2.0 (e0f33ff)
• chore(release): 1.2.1 (983d44c)
• test: init test file (3f2cdc5)
• test(travis): install winston in before script (fa595c9)
• feat: init index.js (04f8e2e)
• feat(ci): init .travis.yml (ef2e57e)
• feat(ci): update .travis.yml (e9f1735)
• feat(package): add lodash.omit and winston (0f09ea4)