Add fix-up for invalid star comparison with major-only version (#1410)

## Summary

Closes #1402.

## Test Plan

Ran `cargo run pip install junos-eznc==2.6.5`, which still fails for me,
but fails identically to `pip` (and not on the `requires-python`):

```
/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmp7mxT9L/built-wheels-v0/pypi/ncclient/0.6.13/4vvPwmDC_CL2OUXd68Zqb/ncclient-0.6.13.tar.gz/versioneer.py:421: SyntaxWarning: invalid escape sequence '\s'
  LONG_VERSION_PY['git'] = '''
Traceback (most recent call last):
  File "<string>", line 10, in <module>
  File "/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmplD5mMO/.venv/lib/python3.12/site-packages/setuptools/build_meta.py", line 366, in prepare_metadata_for_build_wheel
    self.run_setup()
  File "/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmplD5mMO/.venv/lib/python3.12/site-packages/setuptools/build_meta.py", line 480, in run_setup
    super().run_setup(setup_script=setup_script)
  File "/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmplD5mMO/.venv/lib/python3.12/site-packages/setuptools/build_meta.py", line 311, in run_setup
    exec(code, locals())
  File "<string>", line 45, in <module>
  File "/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmp7mxT9L/built-wheels-v0/pypi/ncclient/0.6.13/4vvPwmDC_CL2OUXd68Zqb/ncclient-0.6.13.tar.gz/versioneer.py", line 1480, in get_version
    return get_versions()["version"]
           ^^^^^^^^^^^^^^
  File "/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmp7mxT9L/built-wheels-v0/pypi/ncclient/0.6.13/4vvPwmDC_CL2OUXd68Zqb/ncclient-0.6.13.tar.gz/versioneer.py", line 1412, in get_versions
    cfg = get_config_from_root(root)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/private/var/folders/nt/6gf2v7_s3k13zq_t3944rwz40000gn/T/.tmp7mxT9L/built-wheels-v0/pypi/ncclient/0.6.13/4vvPwmDC_CL2OUXd68Zqb/ncclient-0.6.13.tar.gz/versioneer.py", line 342, in get_config_from_root
    parser = configparser.SafeConfigParser()
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'configparser' has no attribute 'SafeConfigParser'. Did you mean: 'RawConfigParser'?
```

crates/pypi-types/src/lenient_requirement.rs

@@ -14,7 +14,7 @@ static MISSING_COMMA: Lazy<Regex> = Lazy::new(|| Regex::new(r"(\d)([<>=~^!])").u
 static NOT_EQUAL_TILDE: Lazy<Regex> = Lazy::new(|| Regex::new(r"!=~((?:\d\.)*\d)").unwrap());
 /// Ex) `>=1.9.*`, `<3.4.*`
 static INVALID_TRAILING_DOT_STAR: Lazy<Regex> =
-    Lazy::new(|| Regex::new(r"(<=|>=|<|>)(\d+\.\d+)\.\*").unwrap());
+    Lazy::new(|| Regex::new(r"(<=|>=|<|>)(\d+(\.\d+)?)\.\*").unwrap());
 /// Ex) `!=3.0*`
 static MISSING_DOT: Lazy<Regex> = Lazy::new(|| Regex::new(r"(\d\.\d)+\*").unwrap());
 /// Ex) `>=3.6,`
@@ -216,6 +216,10 @@ mod tests {
             .into();
         let expected: VersionSpecifiers = VersionSpecifiers::from_str(">=1.9").unwrap();
         assert_eq!(actual, expected);
+
+        let actual: VersionSpecifiers = LenientVersionSpecifiers::from_str(">=1.*").unwrap().into();
+        let expected: VersionSpecifiers = VersionSpecifiers::from_str(">=1").unwrap();
+        assert_eq!(actual, expected);
     }
 
     #[test]