Update Moment.js from 2.6.0 to 2.7.0

Project site

* http://momentjs.com/ and https://github.com/moment/moment/

File source

* https://github.com/moment/moment/blob/2.7.0/moment.js

README

* https://github.com/moment/moment/blob/2.7.0/readme.md

Changelog

https://gist.github.com/ichernev/b0a3d456d5a84c9901d7

difference between 2.6.0 and 2.7.0

new languages

• #1678 Bengali (bn)
• #1628 Azerbaijani (az)
• #1633 Arabic, Saudi Arabia (ar-sa)
• #1648 Austrian German (de-at)

features

• #1663 configurable relative time thresholds
• #1554 support anchor time in moment.calendar
• #1693 support moment.ISO_8601 as parsing format
• #1637 add moment.min and moment.max and deprecate min/max instance methods
• #1704 support string value in add/subtract
• #1647 add spm support (package manager)

bugfixes

• #1651 fixes #1627 fix timezone parsing in some edge cases
• #1641 fixes #1626 fix creation from week/weekday/weekyear for weeks starting monday
• #1616 fix language code of cyrillic Serbian (sr-cyrl) and latin Tamazight (tzm-latn)

language bugfixes

• #1699 fixes #1326 use lowercase months in Italian
• #1650 partly fixes #1640 implement meridiem parsing for Russian
• #1673 fix lithuanian weekday names for weeks not starting Monday
• #1433 Better "time ago" expression for European Portuguese
• #1671 Improve welsh past expressions
• #1449 Use dot after the day number in Danish
• #1559 Update arabic numbers, meridiem and short weekdays
• #1622 Fix previous Saturday in Greek

tests

• #1687 fixed flaky test in Russian timezone

Change-Id: If8e065bf9e0962059697e6f08100e7bc966cd32f