CTAN update: l3kernel

[CTAN Announcements]

The LaTeX Team submitted an update to the

                l3kernel

package.

Version number: 2020-01-12
License type: lppl1.3c

Summary description: LaTeX3 programming conventions

Announcement text:
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## [2020-01-12]

### Added
- `bool_case_true:n(TF)` and `\bool_case_false:n(TF)`
- `\file_hex_dump:n(nn)` and `\file_get_hex_dump:n(nn)N(TF)`
- `\str_<type>case:n`
- `\text_<type>case:n(n)`
- `\text_expand:n` and supporting data structures

### Changed
- Distribute LaTeX3 News
- Moved `\char_<type>case:N` to stable
- Documentation improvements

### Fixed
- Inherit key required/forbidden properties (see #653)
- Set backend at the beginning of `\document` (see #657)

### Deprecated
- `\str_<type>_case:n`
- `\tl_<type>_case:n(n)`


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This package is located at 
   http://mirror.ctan.org/macros/latex/contrib/l3kernel

More information is at
   https://www.ctan.org/pkg/l3kernel

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   Thanks for the upload.

     For the CTAN Team
    Erik Braun

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