This version adds Unicode support, support for TOML standard including multiline strings, digit separators, string escape sequences,and dot notation. An initial round of a fuzzer was added to testing which has caught several bugs related to config file processing, and a few other edge cases not previously observed. Add Unicode support and bug fixes #804, #923, #876, #848, #832, #987 Match TOML standard for string and numerical entries, multiline strings #968, #967,#964, #935 Add validation for environmental variables #926 Add an escape string transform #970 Add A REVERSE multi-option policy to support multiple config files and other applications #918 Add usage message replacement #768 Allow using dot notation for subcommand arguments such as --sub1.field #789 Bugfix: Fuzzing tests and fixes #930, #905, #874, #846 Bugfix: Missing coverage tests #928 Bugfix: CMake package and package config tests and fixes #916 Bugfix: Support for Windows ARM compilation and tests #913, #914 Bugfix: Environmental variable checks in non-triggered subcommands #904 Bugfix: Environmental variables were not being correctly process by config pointer #891 Bugfix: Undefined behavior in sum_string_vector #893 Bugfix: Warnings and updates for CUDA 11 support #851 Backend: Add tests for newer compilers (lost with Travis CI) #972 Backend: Increase minimum CMake to 3.5 #898 Backend: Remove integrated Conan support (provided now by Conan center) #853 Tests: Support Catch2 Version 3 #896, #980 New Contributors @andreasxp made their first contribution in https://github.com/CLIUtils/CLI11/pull/804 @Krzmbrzl made their first contribution in https://github.com/CLIUtils/CLI11/pull/844 @ptheywood made their first contribution in https://github.com/CLIUtils/CLI11/pull/851 @trokhymchuk made their first contribution in https://github.com/CLIUtils/CLI11/pull/893 @peterh made their first contribution in https://github.com/CLIUtils/CLI11/pull/913 @looopTools made their first contribution in https://github.com/CLIUtils/CLI11/pull/969 Full Changelog: https://github.com/CLIUtils/CLI11/compare/v2.3.2...v2.4.0