OmitDeep: fix handling if path not matched

[Emiyaaaaa]

change:

before

OmitDeep<{a: string}, 'bbb'> // 'bbb' throw ts error

now

OmitDeep<{a: string}, 'bbb'> // no error and code hints are working

fixed:

before

type A = OmitDeep<{a: string}, 'bbb'>
// type A = never

now

type A = OmitDeep<{a: string}, 'bbb'>
// type A = {a: string}