update elements and fix some bugs

lib/src/prism/tests/languages/ruby/keyword_feature.test

+alias and BEGIN begin
+break case
+class;
+def
+define_method defined
+do each else elsif
+END end ensure false
+for if in module
+new;
+next nil not
+or raise redo require
+rescue retry return
+self super then throw
+true undef unless until
+when while yield
+
+----------------------------------------------------
+
+[
+        ["keyword", "alias"], ["keyword", "and"], ["keyword", "BEGIN"], ["keyword", "begin"],
+        ["keyword", "break"], ["keyword", "case"],
+        ["keyword", "class"], ["punctuation", ";"],
+        ["keyword", "def"],
+        ["keyword", "define_method"], ["keyword", "defined"],
+        ["keyword", "do"], ["keyword", "each"], ["keyword", "else"], ["keyword", "elsif"],
+        ["keyword", "END"], ["keyword", "end"], ["keyword", "ensure"], ["keyword", "false"],
+        ["keyword", "for"], ["keyword", "if"], ["keyword", "in"], ["keyword", "module"],
+        ["keyword", "new"], ["punctuation", ";"],
+        ["keyword", "next"], ["keyword", "nil"], ["keyword", "not"],
+        ["keyword", "or"], ["keyword", "raise"], ["keyword", "redo"], ["keyword", "require"],
+        ["keyword", "rescue"], ["keyword", "retry"], ["keyword", "return"],
+        ["keyword", "self"], ["keyword", "super"], ["keyword", "then"], ["keyword", "throw"],
+        ["keyword", "true"], ["keyword", "undef"], ["keyword", "unless"], ["keyword", "until"],
+        ["keyword", "when"], ["keyword", "while"], ["keyword", "yield"]
+]
+
+----------------------------------------------------
+
+Checks for all keywords.