highlights(python): add support for pattern matching

Fixes nvim-treesitter#2080
Depends on tree-sitter/tree-sitter-python#140

queries/python/highlights.scm

@@ -230,7 +230,7 @@
 ["from" "import"] @include
 (aliased_import "as" @include)
 
-["if" "elif" "else"] @conditional
+["if" "elif" "else" "match" "case"] @conditional
 
 ["for" "while" "break" "continue"] @repeat
 

tests/query/highlights/python/pattern_matching.py

@@ -0,0 +1,50 @@
+match command.split():
+# ^ conditional
+    case ["quit"]:
+    # ^ conditional
+        print("Goodbye!")
+        quit_game()
+    case ["look"]:
+    # ^ conditional
+        current_room.describe()
+    case ["get", obj]:
+    # ^ conditional
+        character.get(obj, current_room)
+    case ["go", direction]:
+    # ^ conditional
+        current_room = current_room.neighbor(direction)
+    # The rest of your commands go here
+
+match command.split():
+# ^ conditional
+    case ["drop", *objects]:
+    # ^ conditional
+        for obj in objects:
+            character.drop(obj, current_room)
+
+match command.split():
+# ^ conditional
+    case ["quit"]: ... # Code omitted for brevity
+    case ["go", direction]: pass
+    case ["drop", *objects]: pass
+    case _:
+        print(f"Sorry, I couldn't understand {command!r}")
+
+match command.split():
+# ^ conditional
+    case ["north"] | ["go", "north"]:
+    # ^ conditional
+        current_room = current_room.neighbor("north")
+    case ["get", obj] | ["pick", "up", obj] | ["pick", obj, "up"]:
+    # ^ conditional
+        pass
+
+match = 2
+#   ^ variable
+match, a = 2, 3
+#   ^ variable
+match: int = secret
+#   ^ variable
+x, match: str = 2, "hey, what's up?"
+# <- variable
+#   ^ variable