Require Python package version to be equal to the REPL one

While we keep them in the same repo and version them synchronously it
works. Local version of the Python package doesn't intervene to the
check because PEP440 requires it to be compatible with a public version.

repl/src/metta_shim.rs

@@ -95,23 +95,7 @@ pub mod metta_interface_mod {
 
         fn required_hyperon_version() -> String {
             const PACKAGE_VERSION: &str = env!("CARGO_PKG_VERSION");
-
-            fn comparator(op: semver::Op, ver: &semver::Version) -> semver::Comparator {
-                semver::Comparator{
-                    op,
-                    major: ver.major,
-                    minor: Some(ver.minor),
-                    patch: Some(0),
-                    pre: semver::Prerelease::EMPTY,
-                }
-            }
-
-            let mut ver = semver::Version::parse(PACKAGE_VERSION).unwrap();
-            let lower_bound = comparator(semver::Op::GreaterEq, &ver);
-            ver.minor = ver.minor + 1;
-            let upper_bound = comparator(semver::Op::Less, &ver);
-            let req = semver::VersionReq{ comparators: vec![lower_bound, upper_bound] };
-            req.to_string()
+            format!("=={PACKAGE_VERSION}")
         }
 
         pub fn init_common_env(working_dir: PathBuf, include_paths: Vec<PathBuf>) -> Result<MettaShim, String> {