Fix GDScript test cases

modules/gdscript/tests/scripts/analyzer/features/constants_from_parent.out

@@ -1,4 +1,4 @@
 GDTEST_OK
-a 0 True
-b 1 True
-c 2 True
+a 0 true
+b 1 true
+c 2 true

modules/gdscript/tests/scripts/analyzer/features/enum_from_parent.out

@@ -1,4 +1,4 @@
 GDTEST_OK
-a 0 True
-b 1 True
-c 42 True
+a 0 true
+b 1 true
+c 42 true

modules/gdscript/tests/scripts/analyzer/features/enum_value_from_parent.out

@@ -1,4 +1,4 @@
 GDTEST_OK
-a 0 True
-b 1 True
-c 42 True
+a 0 true
+b 1 true
+c 42 true