[zshdb] Release 0.07 is out

[Rocky B. <ro...@gn...>]

A new release is out. The first three items from the NEWS file I think
are cool.

Some wiki entries for the he first three features. See

https://github.com/rocky/zshdb/wiki/Terminal-Colors
https://github.com/rocky/zshdb/wiki/Evaluating-the-current-source-line-before-it-runs
https://github.com/rocky/zshdb/wiki/Nested-Shell

- syntax coloring if the Python pygments package installed (and
 --highlight option used)
- easy way to evaluate the current source line or expression inside
 the source line (debugger commands "eval" and "eval?")
- ability to go into a nested shell but keeping existing variables and
 functions set. (debugger command "shell") With this, one needs...
- ability to save variables to an outer shell ("set_vars" function
 inside the interactive shell)
- ability to save values from inside a subshell to the outer shell
 (debugger command "export")
- add debugger "display" and "undisplay" commands
- add --init-file (akin to same option in bash) to have bash code
 sourced