Add support for all elements in the `RichText` parser

[Sub6Resources]

The following still need support in the RichText version of the parser:

• address
• aside
• bdi
• bdo (Too complicated to implement without official support in the Flutter framework for this)
• big
• cite
• data
• del
• ins
• kbd
• mark
• nav
• noscript
• q
• rp
• rt
• ruby
• s
• samp
• span
• strike
• sub
• sup
• template
• time
• tt
• var

[The-Redhat]

Although the HtmlRichTextParser doesn't support span, it would be great if it simply shows the content. Now it's looking really weird, because text is missing.

[Sub6Resources]

Support for span has been added in version 0.9.5.

[Sub6Resources]

Support for address added in 0.9.8.

[Sub6Resources]

Support for aside, bdi, big, cite, data, ins, kbd, mark, nav, noscript, q, rp, rt, ruby, s, samp, strike, template, time, tt, and var added in version 0.10.0.

[Sub6Resources]

0.11.0 adds partial support for the sub tag. Unfortunately, the remaining two: sup and bdo present a challenge due to a lack of support for bidirectionality and superscripted text in the Flutter engine. Hopefully coming months sees this support added. 1.0.0 will add a workaround for sub and sup. The average user isn't going to be too worried about bdo though, so support will take longer for that one.

Closing this issue for now. Prefer opening new issues rather than commenting on this one.