Update globset in russh-config to 0.4

[pbar1]

globset in russh-config was set to a very old version (0.3), from 2018. This transitively also pulls in a very old version of regex (0.2), which required a build script. Fixing this removes a build script from the transitive dependency set, making russh-config easier to build in non-Cargo environments as well.

Tests in russh-config pass:

♪ cd russh-config
♪ cargo test
   Compiling russh-config v0.54.0 (/code/russh/russh-config)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.52s
     Running unittests src/lib.rs (/code/russh/target/debug/deps/russh_config-24c26694da1c4719)

running 5 tests
test tests::expand_home ... ok
test tests::strip_quotes ... ok
test tests::is_clone ... ok
test tests::default_config ... ok
test tests::basic_config ... ok

test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Doc-tests russh_config

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

[Eugeny]

Thanks!