Replace wp_make_content_images_responsive().

[joemcgill]

Is your feature request related to a problem? Please describe.
Based on https://core.trac.wordpress.org/changeset/47554, wp_make_content_images_responsive() will be deprecated in WP 5.5 and replaced by wp_filter_content_tags(). There are currently two places in this plugin where wp_make_content_images_responsive() are being called directly, which will throw deprecation notices when running against WP trunk. See: https://github.com/WordPress/gutenberg/search?q=wp_make_content_images_responsive&unscoped_q=wp_make_content_images_responsive

Describe the solution you'd like
Replace instances of wp_make_content_images_responsive() with wp_filter_content_tags() if the latter function exists and fallback to wp_make_content_images_responsive() if not.

Describe alternatives you've considered
I'm curious in the two places where this is called why specifically all these formatting functions are being called directly, rather than applying the_content hook to the template part code?

[johnstonphilip]

I just opened a PR for those here:
#21514

@joemcgill You can find the PR why that (the_content) was changed here:
#20343

[joemcgill]

Yeah the PR looks good. Thanks for the explanation and helpful example. I wonder if long-term it would make sense to process all formatting functions through a filter specifically for template parts so that changes to default formatting of content could be hooked/unhooked as needed, but this takes care of the current problem.

[skorasaurus]

was later fixed in #21514