* 'develop' of https://github.com/ONLYOFFICE/sdkjs:
  add unit tests for CONCAT formula
  add CONCAT formula
  add tests for XOR formula
  fix presentation numbering bugs
  Add ability to run onlyofficetestingrobot/doc-builder-testing on build (#127)
  Added new function CDocument.CanEdit() to check whether we can edit the document or not. This check was added to a function that checks for locks, so there is no need to set GlobalLock in FillingForm mode and AddCommentsInView mode.
  _checkArguments -> _prepareArguments(return obj)

Added new function CDocument.CanEdit() to check whether we can edit the document or not. This check was added to a function that checks for locks, so there is no need to set GlobalLock in FillingForm mode and AddCommentsInView mode.

Stop travis build if any line ended with failure

Add `.unit-tests/FormulaTests.html` run to build process

Hotfix/v4.3.5