v1.2.0

• New function external_info(), information about external software.
  It can be also requested with the new info argument of
  session_info() (@llrs).

• New function python_info(), information about Python configuration.
  It is automatically included in session_info() if the reticulate
  package is loaded and Python is available. You can also request it
  manually via the new info argument of session_info() (#33).

• The output of session_info() now has an emoji hash, consisting of
  three emojis. This allows quick comparison of two session infos (#26).

• All *_info() functions use ANSI colors on systems that support them.
  In particular, it highlights unusual package versions and sources,
  and possible package problems (#3).

• New session_diff() function, to compare two session infos from
  various sources (#6).

• session_info() has a new argument named info, to select which parts
  of the session information should be printed.

• session_info() now has a to_file argument, to write the output to a
  file (#30).

• session_inf() has a dependencies argument now, and passes it to
  package_info().

• package_info() and session_info() can now list the attached or
  installed packages, see the pkgs argument in the manual for
  details (#42).

• platform_info() and session_info() now include the Windows build
  number in the output (#40).

• sessioninfo now never wraps the output if the screen is too narrow (#31).

• All *_info() functions have a format() S3 method now.

• platform_info() and session_info() now include the RStudio version if
  the R session is in RStudio (#29).

• The source column of the package list is now more informative.