var FOO;
const FOO_BAR;
const BAZ42;

----------------------------------------------------

[
	["keyword", "var"],
	["constant", "FOO"],
	["punctuation", ";"],
	["keyword", "const"],
	["constant", "FOO_BAR"],
	["punctuation", ";"],
	["keyword", "const"],
	["constant", "BAZ42"],
	["punctuation", ";"]
]

----------------------------------------------------

Checks for constants.