Ttdl Versions Save

• Fix the command add crash when the command-line option --dry-run is used

Update TTDL and todo_lib code so it can be build with 32-bit compilers.

NOTE: No changes for 64-bit, so you can use the binaries from the previous release. So, the archives for this release are the same as for the previous one 3.6.2.

1. Hide empty todos by default
2. Command-line option --all shows empty todos
3. Command clean(archive) erases all empty todos from todo.txt. If you want to keep them, pass the command-line option --keep-empty
4. Fixed syntax highlight in --compact mode

• TTDL can show custom columns which content is based on a selected tag values (see Custom columns in the README.md)
• Switch to Rust 2021 edition

A lot of new stuff in this release:

• Hashtags support (A hashtag is a word starting with # symbol): add, remove, replace, and filter by hashatgs
• New commands to manage custom tags (--set-tag and --del-tag)
• Fix incorrect calculation of the number of due todos in stats output
• Syntax highlight for subject output

• Fixed: postpone did not change due date. Only --dry-run worked as expected
• Clippy fixes

• Now when a recurrent task is done, the new todo cloned from the original one gets today's date as todo's creation date. Only if the original todo had creation date set
• -all option did not work correctly: even with this option TTDL never displayed todos with threshold date in the future. Now --all shows everything
• Version 3.4.4 is the same as 3.4.3. The only difference is that todo_lib version increased due to updating a test(no other code changes) and Cargo.toml now runs stripping debug info from the release binary automatically. That was why 3.4.3 release was not announced.

• Found and fixed the remained eprintln in case of broken pipe
• Bump dependencies

Command set-rec only modified only todos that were marked done: it cleared done flag and applied the new recurrence. Normal todos remained unchanged.