fix(tagged-union): rebase and squash

fix(tagged-union): changed test programs to use new tagged union
generated code

fix(tagged-union): changed test programs to use new tagged union generated code

fix(tagged-union): removed local dependency and changed to point to 0.9.1 version of wasi

fix(tagged-union): added newline to gitignore, changed wasi version to 0.10.0

fix(tagged-union): removed gitignore as Cargo.lock is intentional

crates/test-programs/wasi-tests/src/lib.rs

@@ -15,7 +15,7 @@ pub fn open_scratch_directory(path: &str) -> Result<wasi::Fd, String> {
                 Ok(s) => s,
                 Err(_) => break,
             };
-            if stat.pr_type != wasi::PREOPENTYPE_DIR {
+            if stat.tag != wasi::PREOPENTYPE_DIR {
                 continue;
             }
             let mut dst = Vec::with_capacity(stat.u.dir.pr_name_len);