- Update to 0.15.4:
* New Features
- build: Add a developer target to test build dist without automake
- languages: Add Brazilian Portuguese specific hyphenation point
- packages: Biblatex data inheritance and field mapping
- packages: Support `@string` syntax in bibTeX bibliography
- packages: Support `@xdata` entry type and xdata field in bibTeX bibliography
- packages: Support crossref field in bibTeX bibliography
- tooling: Add developer target to build Rust API docs
* Bug Fixes
- build: Avoid building sile binaries if not using them
* build: Avoid the perceived need for an extra automake cycle in dist tarball
* build: Do not distribute main man page, requires Rust tooling
* build: Don't distribute distfiles list with configure option specific output
* languages: Always set Fluent locale when setting `document.language`
* packages: Correct handling of ampersands and tildes in bibtex
* packages: Ignore `@preamble` in bibTeX bibliography

- Add export LUA_INCLUDE="-I/usr/include/luajit-5_1-2.1"