Closes #7

Resolve "Introduce function to get the last week of a year"

Closes #6

See merge request !7

Merge branch '5-problems-with-dates-in-the-new-year-but-in-the-last-calendar-week-of-the-old-year' into 'master'

Resolve "Problems with dates which are in the new year, but in the last calendar week of the old year"

Closes #5

See merge request !6

Use default language from settings if language is not recognizable

See merge request !5

Don't add encondings in i18n functions

See merge request !4

Configure Renovate

See merge request !2

Convert enums to lists for Django choices

See merge request !1

Makes using in Django templates easier