refactor(tocco-util): remove lodash omit
refactor(tocco-util): remove lodash omit

- occasionally tests failed because lodash omit did not work. This is most likely
  due to the lodash-webpack plugin. But since omit gets removed with lodash 5.0
  we replace it anyway. Lodashwebpack plugin still saves us 35kb in the final build
  thats why we keep it for the moment.
- fix typo

tocco/tocco-client,tocco/tocco-client,tocco/tocco-client