Add TypeScript definition (#4)

.gitattributes

@@ -1,2 +1 @@
-* text=auto
-*.js text eol=lf
+* text=auto eol=lf

.travis.yml

@@ -1,4 +1,5 @@
 language: node_js
 node_js:
+  - '10'
   - '8'
   - '6'

index.d.ts

@@ -0,0 +1,20 @@
+/**
+Check if a path is in the [current working directory](https://en.wikipedia.org/wiki/Working_directory).
+
+@example
+```
+import isPathInCwd = require('is-path-in-cwd');
+
+isPathInCwd('unicorn');
+//=> true
+
+isPathInCwd('../rainbow');
+//=> false
+
+isPathInCwd('.');
+//=> false
+```
+*/
+declare function isPathInCwd(path: string): boolean;
+
+export = isPathInCwd;

index.js

@@ -1,4 +1,4 @@
 'use strict';
 const isPathInside = require('is-path-inside');
 
-module.exports = input => isPathInside(input, process.cwd());
+module.exports = path => isPathInside(path, process.cwd());

index.test-d.ts

@@ -0,0 +1,4 @@
+import {expectType} from 'tsd';
+import isPathInCwd = require('.');
+
+expectType<boolean>(isPathInCwd('unicorn'));

package.json

@@ -13,10 +13,11 @@
 		"node": ">=6"
 	},
 	"scripts": {
-		"test": "xo && ava"
+		"test": "xo && ava && tsd"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"path",
@@ -30,10 +31,11 @@
 		"inside"
 	],
 	"dependencies": {
-		"is-path-inside": "^1.0.0"
+		"is-path-inside": "^2.1.0"
 	},
 	"devDependencies": {
-		"ava": "*",
-		"xo": "*"
+		"ava": "^1.4.1",
+		"tsd": "^0.7.2",
+		"xo": "^0.24.0"
 	}
 }

test.js

@@ -1,10 +1,10 @@
 import test from 'ava';
-import m from '.';
+import isPathInCwd from '.';
 
 test('main', t => {
-	t.true(m('foo'));
-	t.false(m('.'));
-	t.false(m('/'));
-	t.false(m('..'));
-	t.false(m('../rainbow'));
+	t.true(isPathInCwd('foo'));
+	t.false(isPathInCwd('.'));
+	t.false(isPathInCwd('/'));
+	t.false(isPathInCwd('..'));
+	t.false(isPathInCwd('../rainbow'));
 });