convert project to typescript

Author: noogen

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - '8'
   - '10'
   - '12'
-  - '13'
+  - '14'
+  - '15'

dist/index.d.ts

@@ -0,0 +1,30 @@
+/// <reference types="node" />
+import { EventEmitter } from 'events';
+import { TextFileDiffOption } from './types';
+import { PathLike } from 'fs';
+import LineByLine = require('n-readlines');
+export declare class MyLineReader extends LineByLine {
+    val: string;
+    nextVal: string;
+    lineNumber: number;
+    myFile: string | undefined;
+    charset: any;
+    eof: number;
+    constructor(file: PathLike | number);
+    moveNext(): string;
+}
+/**
+ * line by line diff of two files
+ */
+export default class TextFileDiff extends EventEmitter {
+    options: TextFileDiffOption;
+    constructor(options?: TextFileDiffOption);
+    /**
+     * run diff
+     * @param  String file1 path to file 1
+     * @param  String file2 path to file 2
+     * @return Object         self
+     */
+    diff(file1: string, file2: string): this;
+    doCompareLineReader(lineReader1: MyLineReader, lineReader2: MyLineReader): void;
+}

dist/index.js

@@ -0,0 +1,5 @@
+export declare class TextFileDiffOption {
+    skipHeader: boolean;
+    charset: any;
+    compareFn(line1: string, line2: string): 1 | -1 | 0;
+}

dist/types.d.ts

@@ -1,6 +1,6 @@
 {
   "name": "text-file-diff",
-  "version": "1.1.2",
+  "version": "1.2.0",
   "description": "line by line diff of two large files",
   "license": "MIT",
   "repository": "niiknow/text-file-diff",
@@ -10,16 +10,19 @@
     "url": "niiknow.org"
   },
   "engines": {
-    "node": ">=6"
+    "node": ">=10",
+    "npm": ">=6"
   },
   "scripts": {
-    "test": "xo && nyc ava",
-    "report": "nyc report --reporter=html"
+    "build": "tsc",
+    "test": "tsc && cross-env DEBUG=text-file-diff xo && cross-env DEBUG=text-file-diff nyc ava",
+    "report": "tsc && cross-env DEBUG=text-file-diff nyc report --reporter=html"
   },
   "bin": {
     "text-file-diff": "./bin/text-file-diff"
   },
-  "main": "index.js",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
   "keywords": [
     "diff",
     "difference",
@@ -28,11 +31,17 @@
     "compare-files"
   ],
   "dependencies": {
-    "n-readlines": "^1.0.0"
+    "@types/n-readlines": "^1.0.1"
   },
   "devDependencies": {
+    "@types/node": "^14.14.21",
     "ava": "^2.4.0",
+    "cross-env": "^7.0.3",
+    "debug": "^4.3.1",
+    "n-readlines": "^1.0.1",
     "nyc": "^14.1.1",
+    "ts-node": "^9.1.1",
+    "typescript": "^4.1.3",
     "xo": "^0.25.3"
   },
   "xo": {