Upgrade tree-sitter to v0.20.6

This commit also adds a regression test to verify that with this new
version we don't mistakenly compute a different suggestion on Rust
buffer where the only change is leading whitespace.

Cargo.lock

@@ -5381,9 +5381,9 @@ dependencies = [
 
 [[package]]
 name = "tree-sitter"
-version = "0.20.4"
+version = "0.20.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e34327f8eac545e3f037382471b2b19367725a242bba7bc45edb9efb49fe39a"
+checksum = "09b3b781640108d29892e8b9684642d2cda5ea05951fd58f0fea1db9edeb9b71"
 dependencies = [
  "cc",
  "regex",

crates/language/src/tests.rs

@@ -649,6 +649,23 @@ fn test_autoindent_does_not_adjust_lines_with_unchanged_suggestion(cx: &mut Muta
         );
         buffer
     });
+
+    cx.add_model(|cx| {
+        let text = "fn a() {\n    {\n        b()?\n    }\n\n    Ok(())\n}";
+        let mut buffer = Buffer::new(0, text, cx).with_language(Arc::new(rust_lang()), cx);
+        buffer.edit_with_autoindent([(Point::new(3, 4)..Point::new(3, 5), "")], 4, cx);
+        assert_eq!(
+            buffer.text(),
+            "fn a() {\n    {\n        b()?\n            \n\n    Ok(())\n}"
+        );
+
+        buffer.edit_with_autoindent([(Point::new(3, 0)..Point::new(3, 12), "")], 4, cx);
+        assert_eq!(
+            buffer.text(),
+            "fn a() {\n    {\n        b()?\n\n\n    Ok(())\n}"
+        );
+        buffer
+    });
 }
 
 #[gpui::test]

crates/zed/Cargo.toml

@@ -85,7 +85,7 @@ tempdir = { version = "0.3.7" }
 thiserror = "1.0.29"
 tiny_http = "0.8"
 toml = "0.5"
-tree-sitter = "0.20.4"
+tree-sitter = "0.20.6"
 tree-sitter-c = "0.20.1"
 tree-sitter-json = { git = "https://github.com/tree-sitter/tree-sitter-json", rev = "137e1ce6a02698fc246cdb9c6b886ed1de9a1ed8" }
 tree-sitter-rust = "0.20.1"