fix: resolve typer/click compatibility issue with make_metavar error

Fixed TypeError: Parameter.make_metavar() missing 1 required positional argument: 'ctx'
by correcting typer.Option(...) usage for optional parameters with default None values.

Bump version to v0.4.2

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "myice"
-version = "v0.4.1"
+version = "v0.4.2"
 description = "myice parsing"
 authors = [
     { name = "Rene Luria", "email" = "<rene@luria.ch>"},