fix: manually test global regex codeframeRE index

[clarkdo]

codeframeRE.test may return false incorrectly, because codeframeRE has the g flag and the search may begin from middle of string after first time calling test. This pr is manually resetting the index before test gets called

const pattern = /^foo/g
pattern.test('foo') // true
pattern.test('foo') // false