shell-string 0.5.1

Obvious CLI for basic string manipulation
# Changelog

- 0.5.1
    - implement `join` subcommand — joins lines with a configurable separator (inverse of `split`)
    - implement `contains`, `starts-with`, `ends-with` subcommands that exits 0/1, useful in shell if conditions. The absence means users reach for grep -q instead.
- 0.5.0
    - Merge `map` and `foreach` into simplified `each` command
    - improve documentation
- 0.4.1
    - implement `foreach` subcommand
- 0.3.6
    - implement `interleave` subcommand
- 0.3.3
    - implement `trim` subcommand
- 0.3.2
    - implement `case` subcommand for lowercase and uppercase transformations
    - implement proper testing
- 0.3.1
    - `replace` command no longer prints trailing new line
    - start cultivating changelog