chore: use type import

Author: technote-space

src/lib/file.ts

@@ -1,7 +1,7 @@
+import type { FileInfo, FileAndDirs } from '../types';
 import fs from 'fs';
 import path from 'path';
 import { MARKDOWN_EXTENSIONS, IGNORED_DIRS } from '..';
-import { FileInfo, FileAndDirs } from '../types';
 
 const separateFilesAndDirs = (fileInfos: Array<FileInfo>): FileAndDirs => ({
   directories: fileInfos.filter(info => info.stat.isDirectory() && !IGNORED_DIRS.includes(info.name)),

src/lib/get-html-headers.ts

@@ -1,6 +1,6 @@
+import type { HeaderData, Header } from '../types';
 import * as md from '@textlint/markdown-to-ast';
 import * as htmlparser from 'htmlparser2';
-import { HeaderData, Header } from '../types';
 
 const addLinenos = (lines: Array<string>, headers: Array<HeaderData>): Array<Omit<Header, 'rank'> & HeaderData> => {
   let current = 0;

src/lib/params.ts

@@ -1,4 +1,4 @@
-import { SectionInfo, TransformOptions } from '../types';
+import type { SectionInfo, TransformOptions } from '../types';
 
 const getBoolValue = (input: string): boolean => !['false', '0', '', 'no', 'n'].includes(input.trim().toLowerCase());
 const converter    = {

src/types.ts

@@ -1,4 +1,4 @@
-import { Stats } from 'fs';
+import type { Stats } from 'fs';
 
 export type TransformOptions = Partial<{
   mode: string;