Fix rustc 1.50 compatibility

Cargo.lock

@@ -1108,7 +1108,7 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "xplr"
-version = "0.12.0"
+version = "0.12.1"
 dependencies = [
  "ansi-to-tui",
  "anyhow",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "xplr"
-version = "0.12.0"  # Update lua.rs
+version = "0.12.1"  # Update lua.rs
 authors = ["Arijit Basu <sayanarijit@gmail.com>"]
 edition = "2018"
 description = "A hackable, minimal, fast TUI file explorer"

src/lua.rs

@@ -134,9 +134,10 @@ mod test {
     fn test_compatibility() {
         assert!(check_version(VERSION, "foo path").is_ok());
         assert!(check_version("0.12.0", "foo path").is_ok());
+        assert!(check_version("0.12.1", "foo path").is_ok());
 
-        assert!(check_version("0.12.1", "foo path").is_err());
-        assert!(check_version("0.10.0", "foo path").is_err());
+        assert!(check_version("0.12.2", "foo path").is_err());
+        assert!(check_version("0.11.0", "foo path").is_err());
         assert!(check_version("1.12.0", "foo path").is_err());
     }
 }

src/ui.rs

@@ -475,8 +475,9 @@ fn draw_table<B: Backend>(
                         })
                         .unwrap_or_default();
 
-                    let (mimetype, mimesub) =
-                        node.mime_essence().split_once("/").unwrap_or_default();
+                    let mut me = node.mime_essence().splitn(2, '/');
+                    let mimetype: String = me.next().map(|s| s.into()).unwrap_or_default();
+                    let mimesub: String = me.next().map(|s| s.into()).unwrap_or_default();
 
                     let node_type = app_config
                         .node_types()
@@ -487,8 +488,8 @@ fn draw_table<B: Backend>(
                             app_config
                                 .node_types()
                                 .mime_essence()
-                                .get(mimetype)
-                                .and_then(|t| t.get(mimesub).or_else(|| t.get("*")))
+                                .get(&mimetype)
+                                .and_then(|t| t.get(&mimesub).or_else(|| t.get("*")))
                         })
                         .unwrap_or_else(|| {
                             if node.is_symlink() {