Log Message:
(devel/R-callr) Update 3.7.0 to 3.7.3

# callr 3.7.3

* Errors from callr now include the standard output (in `$stdout`) and
  standard error (in `stderr`) again. The standard output and error are also
  printed on error in non-interactive sessions, and a note is printed about
  them in interactive sessions.

# callr 3.7.2

* New function `add_hook()` to hook into the callr process startup and
  options. This is for experts and it is also currently experimental
  (#203, @klmr).

# callr 3.7.1

* When copying existing startup files, an additional newline is appended to
  protect against a missing newline at the end of the file. This would
  cause R ignore that line (#205).

* Serialization of objects passed between sessions now uses `compress=FALSE`
  by default. The default can be changed by setting the
  `callr.compress_transport` option (#223, @dfalbel).

* We have revamped callr's error objects, with lots of improvements to the
  output.