updated strftime lib. fixes #4449

updated kissifrot/php-ixr closes #4429

updated php-cli #4384

dependency updates

updated simplepie, contains php 8.4 fixes

updated lesserphp

Replace strftime with Intl ICU. Fixes #3573

This uses a class that maps strftime placeholders to the appropriate ICU
patterns. I am using the fallback-intl branch here which provides an
English-only

Replace strftime with Intl ICU. Fixes #3573

This uses a class that maps strftime placeholders to the appropriate ICU
patterns. I am using the fallback-intl branch here which provides an
English-only fallback when the intl extension is not available.

Core has only two places where strftime is used: dformat() and the
SimplePie feed parser. Both are adjusted with this patch. For the latter
a custom Item class had to be registered. For better separation all our
FeedParser classes have been moved to the Feed namespace where our
FeedCreator classes already reside.

Note that this will currently be a degration for users without intl as
it will fall back to date and not to the still available strftime.

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updated composer depedencies

composer updates

replace LESS library. fixes #4088

This replaces the abandoned fork with my own fork at splitbrain/lesserphp

That fork has been cleaned up somewhat and the issues in #4088 should be
fixed.

Updated composer dependencies

upgrade to phpseclib 3

This replaces the dependabot PR #4114 and adjusts the usage of the
library.

updated composer dependencies

updates may also be caused by the php platform version increase in the last
commit

extracted JS compressor into its own library

This moves our JavaScript compressor into its own composer dependency.

updated repo links

updated composer dependencies

update to lesserphp 0.6

updated composer dependencies

upgraded UniversalFeedCreator to v1.8.4.1

fixes #3651

updated composer.lock

move IXR XML RPC to composer dependency #1970

This is a monky patched version of kissyfrot/php-ixr until my PR has
been accepted upstream.

Plugins using the XML RPC client may need adjustments.

updated composer dependencies

upgrade simplepie to 1.5.6

Fix for Remove random_compat, no longer needed #3262

Merge pull request #3251 from splitbrain/slika

use Slika for image resizing and cropping