patch IsDotFile function compatible with both '.' and '..'
patch IsDotFile function compatible with both '.' and '..'

Signed-off-by: Huitse Tai <ed47b3579b7f6538a8980e905b6b2a068caf47fb@gmail.com>

go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry