refactor(junit-reporter): remove template strings
refactor(junit-reporter): remove color dependency
chore(deps): update dependencies

Remove 'color' module and add 'lodash' and 'xmlbuilder'
as new dependencies to package.json and require them in
in reporter module.
refactor(junit-reporter): remove string based building of result
refactor(junit-reporter): remove extra error handling
refactor(junit-reporter): rename time related instance variables
refactor(junit-reporter): generate test results in xml format
refactor(junit-reporter): write report to `cwd`
style(junit-reporter): re-indent imports and variables
style(junit-reporter): break line to respect 80 chars line length
refactor(junit-reporter): move report persistance into helper