Added tests for expression matching

modules/gdscript/tests/scripts/parser/features/basic_expression_matching.gd

@@ -0,0 +1,27 @@
+func foo(x):
+    match x:
+        1:
+            print("1")
+        2:
+            print("2")
+        [1, 2]:
+            print("[1, 2]")
+        3 or 4:
+            print("3 or 4")
+        4:
+            print("4")
+        {1 : 2, 2 : 3}:
+            print("{1 : 2, 2 : 3}")
+        _:
+            print("wildcard")
+
+func test():
+    foo(0)
+    foo(1)
+    foo(2)
+    foo([1, 2])
+    foo(3)
+    foo(4)
+    foo([4,4])
+    foo({1 : 2, 2 : 3})
+    foo({1 : 2, 4 : 3})