Fix bug in Duration addMonth.

Thanks to @pro100filipp for the report and the fix.

New Greek translation.

Thanks to @Geekfish for the greek translation and the generalisation of AM PM time suffix model.

Properly export lithuanian config and i18n now.

v8.7.0 exported lithuanian translation.

Sorry for 8.6.1 and 8.6.2 forgot to add config and i18n to exposed-modules.

new version v8.6.2 as previous version 8.6.1 did not publish properly

Version 8.6.2 previous did not seem to publish correctly.

I probably did something wrong.

Add language lithuanian.

Thanks to @karls.

Add Turkish translation

Thanks to @decafbad for the transtlation.

Fix dayList

Thanks to @AIon-Gbbe for issue report.
See #43

Fix functions in Core for crossing day light saving boundaries.

Fix lastOfMonthDate, toFirstOfMonth, lastOfPrevMonthDate, firstOfNextMonthDate

Thanks to @artbq for report on isoWeek and some valuable comments.
Thanks to @ksamborski for report on dayList
Thanks to @bjorse for his report on toFirstOfMonth which pointed to related issues.

German and Russian translations.

Thanks to @frankschmitt for German translation.
Thanks to @tvv for Russian translation.

Adjust nl, Add ja_jp

Thanks to @michie1 for the contributin and @stil4m for the review.
Thanks to @jinjor for the ja_jp translation and configuration.