Bump to 0.6.2

Changes included in this promotion:

Added

• New attribute include_rts allows choosing whether if retweets are to be posted or ignored.
• New attribute file_max_size allows setting a maximum size limit for attachments. If exceeded, the attachment will be dropped and won't be uploaded to the Fediverse instance.
• Settings to use different nitter instances (thanks zoenglinghou!)

Fixed

• profile_banner_url returns a status code 404 for some users. Now we specifically request the biggest size (1500x500)
• Timestamp format for Mastodon instances adjustments
• Sensitivity boolean ignored by Mastodon instances if capitalized

Enhancements

• Improved Mastodon compatibility