Implement YIELD 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 'def foo; yield end'
@ ProgramNode (location: (1,0)-(1,18))
+-- locals: []
+-- statements:
    @ StatementsNode (location: (1,0)-(1,18))
    +-- body: (length: 1)
        +-- @ DefNode (location: (1,0)-(1,18))
            +-- name: :foo
            +-- name_loc: (1,4)-(1,7) = "foo"
            +-- receiver: nil
            +-- parameters: nil
            +-- body:
            |   @ StatementsNode (location: (1,9)-(1,14))
            |   +-- body: (length: 1)
            |       +-- @ YieldNode (location: (1,9)-(1,14))
            |           +-- keyword_loc: (1,9)-(1,14) = "yield"
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
            |           +-- lparen_loc: nil
                        ^^^^^^^^^^^^^^^^^^^
            |           +-- arguments: nil
            |           +-- rparen_loc: nil
                        ^^^^^^^^^^^^^^^^^^^
            +-- locals: []
            +-- def_keyword_loc: (1,0)-(1,3) = "def"
            +-- operator_loc: nil
            +-- lparen_loc: nil
            +-- rparen_loc: nil
            +-- equal_loc: nil
            +-- end_keyword_loc: (1,15)-(1,18) = "end"
```

1 files changed, 14 insertions, 0 deletions

diff --git a/test/ruby/test_ast.rb b/test/ruby/test_ast.rb
index 4e449410f1..e456f5b7b5 100644
--- a/test/ruby/test_ast.rb
+++ b/test/ruby/test_ast.rb
@@ -1517,6 +1517,20 @@ dummy
       assert_locations(node.children[-1].locations, [[1, 0, 1, 9], [1, 2, 1, 7], nil])
     end
 
+    def test_yield_locations
+      node = ast_parse("def foo; yield end")
+      assert_locations(node.children[-1].children[-1].children[-1].locations, [[1, 9, 1, 14], [1, 9, 1, 14], nil, nil])
+
+      node = ast_parse("def foo; yield() end")
+      assert_locations(node.children[-1].children[-1].children[-1].locations, [[1, 9, 1, 16], [1, 9, 1, 14], [1, 14, 1, 15], [1, 15, 1, 16]])
+
+      node = ast_parse("def foo; yield 1, 2 end")
+      assert_locations(node.children[-1].children[-1].children[-1].locations, [[1, 9, 1, 19], [1, 9, 1, 14], nil, nil])
+
+      node = ast_parse("def foo; yield(1, 2) end")
+      assert_locations(node.children[-1].children[-1].children[-1].locations, [[1, 9, 1, 20], [1, 9, 1, 14], [1, 14, 1, 15], [1, 19, 1, 20]])
+  end
+
     private
     def ast_parse(src, **options)
       begin