Stop locking cargo mutants

[cljoly]

Newer versions now build on the codebase.

[github-actions]

coverage: 92.401%. remained the same
when pulling 3184066 on cljoly-patch-1
into f5d3b8d on master.

[cljoly]

Found a number of mutants to fix

Unmutated baseline ... ok in 24.2s build + 4.0s test
Auto-set test timeout to 20.0s
rusqlite_migration/src/loader.rs:29:5: replace get_migrations -> Result<(&'static str, Option<&'static str>)> with Ok(("xyzzy", Some("xyzzy"))) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/builder.rs:46:15: replace < with > in MigrationsBuilder<'u>::edit ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/builder.rs:46:15: replace < with == in MigrationsBuilder<'u>::edit ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/loader.rs:29:5: replace get_migrations -> Result<(&'static str, Option<&'static str>)> with Ok(("", Some("xyzzy"))) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/errors.rs:51:48: replace == with != in <impl PartialEq for Error>::eq ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/lib.rs:439:24: replace && with || in Migrations<'m>::db_version_to_schema ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/builder.rs:62:9: replace <impl FromIterator for MigrationsBuilder<'u>>::from_iter -> Self with Default::default() ... NOT CAUGHT in 1.3s build + 4.0s test
rusqlite_migration/src/loader.rs:29:5: replace get_migrations -> Result<(&'static str, Option<&'static str>)> with Ok(("", Some(""))) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/errors.rs:48:74: replace == with != in <impl PartialEq for Error>::eq ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/errors.rs:50:57: replace == with != in <impl PartialEq for Error>::eq ... NOT CAUGHT in 1.3s build + 4.0s test
rusqlite_migration/src/loader.rs:29:5: replace get_migrations -> Result<(&'static str, Option<&'static str>)> with Ok(("xyzzy", Some(""))) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/loader.rs:29:5: replace get_migrations -> Result<(&'static str, Option<&'static str>)> with Ok(("", None)) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/builder.rs:34:9: replace MigrationsBuilder<'u>::from_directory -> Result<Self> with Ok(Default::default()) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/errors.rs:46:85: replace == with != in <impl PartialEq for Error>::eq ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/loader.rs:29:5: replace get_migrations -> Result<(&'static str, Option<&'static str>)> with Ok(("xyzzy", None)) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/errors.rs:45:33: replace == with != in <impl PartialEq for Error>::eq ... NOT CAUGHT in 1.3s build + 4.0s test
rusqlite_migration/src/loader.rs:94:5: replace from_directory -> Result<Vec<Option<M<'static>>>> with Ok(vec![]) ... NOT CAUGHT in 1.3s build + 3.9s test
rusqlite_migration/src/lib.rs:76:9: replace <impl Debug for Box<dyn MigrationHook>>::fmt -> fmt::Result with Ok(Default::default()) ... NOT CAUGHT in 1.3s build + 3.9s test
115 mutants tested in 3:56: 18 missed, 56 caught, 41 unviable