These were used to provide the `ts_record_*` functions regardless of
whether the `allocation-tracking` feature is enabled. The allocation
tracking code is now implemented entirely in the `lib` crate, and only
when the feature is enabled, and so these stubs are no longer needed.
Right now this is just used for two things:
* Specifying folders for locarting parsers to use with `tree-sitter
parse` and `tree-sitter highlight`
* Specifying colors to use for `tree-sitter-highlight`
* Structure `cli` crate as both a library and an executable, so that
benchmarks can import code from the crate.
* Import macros in the Rust 2018 style.
