Bump Twenty Twenty-One and Twenty Nineteen theme versions

[desrosj]

New versions of Twenty Twenty-One and Twenty Nineteen will be released today, December 22, 2020.

The versions need to be updated as:

• Twenty Twenty-One: 1.1
• Twenty Nineteen: 1.9

[poena]

I don't think the block-patterns tag should be removed from twentynineteen/style.css? Other than that everything looks correct.

[desrosj]

Actually, this is probably due to #52159 that just came in. I'll fix that and rebuild the styles to confirm.

[desrosj]

In 49873:

Bundled Themes: Bump the versions of Twenty Twenty-One and Twenty Nineteen.

New versions:

• Twenty Twenty-One: 1.1.
• Twenty Nineteen: 1.9.

Props poena.
Fixes #52160.

[desrosj]

Reopening to backport.

[desrosj]

In 49875:

Bundled Themes: Bump the versions of Twenty Twenty-One and Twenty Nineteen.

New versions:

• Twenty Twenty-One: 1.1.
• Twenty Nineteen: 1.9.

Props poena.
Merges [49873] to the 5.6 branch.
Fixes #52160.