Re-enable rmpv testcase

Author: dario23

tests/full.rs

@@ -10,11 +10,6 @@ mod full {
     };
 
     fn test_full(crate_name: &str, old_version: &str, new_version: &str, expected_result: bool) {
-        // FIXME: CI started to fail since 2022-04-25, ignore the rmpv test on CI for now.
-        if crate_name == "rmpv" && env::var_os("CI").unwrap_or_default() == "true" {
-            return;
-        }
-
         // Add target dir to PATH so cargo-semver will call the right rust-semverver
         if let Some(path) = env::var_os("PATH") {
             let mut paths = env::split_paths(&path).collect::<Vec<_>>();