note pipe read fix in changelog

note jp2k load just in changelog

fix insert

We were not detecting the shortcut cases for insert correctly, thanks
chreru.

See libvips#2548

Revert "switch macos CI to the new cgif formula"

This reverts commit 6cdb199.

layout fixes for tga sniff

raise the PNG text chunk limit

Raise the PNG text chunk limit to 50, since it seems some real images
have a text chunk per line of exif data.

See libvips#2433

Merge branch '8.11' of github.com:libvips/libvips into 8.11

not jp2k pyr fix in changelog

add another test for tiff ifd pyramids

test loading from a lower layer

Merge branch 'master' into 8.11