v2.0.0-preview.4

This prerelase update includes the following updates:

• Added support for localization - #619
• Added support for right to left - #619
• Added support for fetching images in mgt-get - #718 (thanks @sebastienlevert)
• Introducing new theming support for dark theme (supported in mgt-people-picker and mgt-teams-channel-picker) - #676
• Added support for a 3rd line in mgt-person - #710
• Adds support for preferred timezone in mgt-agenda - #737 and #746 (thanks @waldekmastykarz and @jasonjoh)
• Optimized fetching presence of multiple people with one graph call - #709 (thanks @sebastienlevert)
• Exposed getInitials and getColorFromName as protected from mgt-person- #751 (thanks @aakashbhardwaj619)
• Fixed Tasks dataSource type in mgt-react - #730
• Fixed mgt-react types - #719 (thanks @RobPethick)
• Fixed mgt-person to only require 'Presence.Read' for current signed in user - #697
• Fixed issue where person would not update when personQuery and userId properties change - #706
• Fixed setting storeAuthStateInCookie in MsalProvider - #699
• Fixed type attribute to events property on agenda component -#687 (thanks @jasonjoh)
• Fixed issue where me call was cached in Proxy Provider - #694
• Fixed blur event fire ordering on selection of person in People Picker - #696
• Fixed font in mgt-tasks arrow options - #722
• Fixed rendering of user-avatar and initials in person/person-card - #684