Require loot-condition-interpreter v6

It includes new functionality that is required for the metadata syntax v0.29.

Add a couple of tests that rely on that new functionality so that the
dependency is backed by tests that fail if it's not met.

Cargo.toml

@@ -12,7 +12,7 @@ crc32fast = "1"
 esplugin = "6.1"
 libloadorder = "18.5"
 log = { version = "0.4.6", features = ["std"] }
-loot-condition-interpreter = ">= 5, < 7"
+loot-condition-interpreter = "6"
 petgraph = ">= 0.6, < 0.9"
 rayon = "1"
 regress = "0.10.5"

src/database/conditions.rs

@@ -194,4 +194,31 @@ mod tests {
             assert!(evaluate_all_conditions(plugin, &state).unwrap().is_none());
         }
     }
+
+    mod evaluate_condition {
+        use crate::tests::source_plugins_path;
+
+        use super::*;
+
+        #[test]
+        fn should_support_version_with_comparator_as_second_parameter() {
+            let mut state = loot_condition_interpreter::State::new(
+                loot_condition_interpreter::GameType::Oblivion,
+                source_plugins_path(crate::GameType::Oblivion),
+            );
+            state.set_plugin_versions(&[("Blank.esp", "1.0.0")]);
+
+            assert!(evaluate_condition("version(\"Blank.esp\", ==, \"1.0.0\")", &state).unwrap());
+        }
+
+        #[test]
+        fn should_eval_less_than_missing_version_as_false() {
+            let state = loot_condition_interpreter::State::new(
+                loot_condition_interpreter::GameType::Oblivion,
+                source_plugins_path(crate::GameType::Oblivion),
+            );
+
+            assert!(!evaluate_condition("version(\"example.esp\", \"1.0.0\", <)", &state).unwrap());
+        }
+    }
 }