Comment after imports gets removed

[mhofstetter]

What version of GCI are you using?

v0.8.3

Reproduce Steps

Executing gci on the following source code removes the comment // Test on the struct which is following the imports.

It seems as the changed parsing logic is not respecting comments which might exist on a top level declaration: https://github.com/daixiang0/gci/blob/master/pkg/parse/parse.go#L115-L117

package main

import (
	"fmt"
	_ "github.com/golang" // golang
	"github.com/daixiang0/gci"
)

// Test
type Test struct {
}

->

package main

import (
	"fmt"

	_ "github.com/golang" // golang

	"github.com/daixiang0/gci"
)

type Test struct {
}

What did you expect to see?

Only imports should be modified - comments of following declarations (e.g. structs) should not be removed.

What did you see instead?

The comment of following declarations (e.g. structs) are getting removed.

[mhofstetter]

I saw that #120 mentions the following

introduce breaking change: remove isolated comments

but i don't think that this is an "isolated comment"

[daixiang0]

#124 would fix this, thanks for report.