Implement CLASS NODE locations

The following Location information has been added This is the information required for parse.y to be a universal parser:

```
❯ ruby --parser=prism --dump=parsetree -e "class A < B; end"
@ ProgramNode (location: (1,0)-(1,16))
+-- locals: []
+-- statements:
    @ StatementsNode (location: (1,0)-(1,16))
    +-- body: (length: 1)
        +-- @ ClassNode (location: (1,0)-(1,16))
            +-- locals: []
            +-- class_keyword_loc: (1,0)-(1,5) = "class"
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
            +-- constant_path:
            |   @ ConstantReadNode (location: (1,6)-(1,7))
            |   +-- name: :A
            +-- inheritance_operator_loc: (1,8)-(1,9) = "<"
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
            +-- superclass:
            |   @ ConstantReadNode (location: (1,10)-(1,11))
            |   +-- name: :B
            +-- body: nil
            +-- end_keyword_loc: (1,13)-(1,16) = "end"
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
            +-- name: :A
```

1 files changed, 6 insertions, 1 deletions

diff --git a/ast.c b/ast.c
index ba2f0eaa00..b98fba6fab 100644
--- a/ast.c
+++ b/ast.c
@@ -787,7 +787,6 @@ node_locations(VALUE ast_value, const NODE *node)
         return rb_ary_new_from_args(2,
                                     location_new(nd_code_loc(node)),
                                     location_new(&RNODE_BLOCK_PASS(node)->operator_loc));
-
       case NODE_BREAK:
         return rb_ary_new_from_args(2,
                                     location_new(nd_code_loc(node)),
@@ -807,6 +806,12 @@ node_locations(VALUE ast_value, const NODE *node)
                                     location_new(nd_code_loc(node)),
                                     location_new(&RNODE_CASE3(node)->case_keyword_loc),
                                     location_new(&RNODE_CASE3(node)->end_keyword_loc));
+      case NODE_CLASS:
+        return rb_ary_new_from_args(4,
+                                    location_new(nd_code_loc(node)),
+                                    location_new(&RNODE_CLASS(node)->class_keyword_loc),
+                                    location_new(&RNODE_CLASS(node)->inheritance_operator_loc),
+                                    location_new(&RNODE_CLASS(node)->end_keyword_loc));
       case NODE_DOT2:
         return rb_ary_new_from_args(2,
                                     location_new(nd_code_loc(node)),