Add types for pkg-conf@2.1 (#27284)

* Add types for pkg-conf@2.1

* Refine for tests

* Remove fixture

* Update pkg-conf-tests.ts

* Fix test

* Update pkg-conf-tests.ts

types/pkg-conf/index.d.ts

@@ -0,0 +1,34 @@
+// Type definitions for pkg-conf 2.1
+// Project: https://github.com/sindresorhus/pkg-conf#readme
+// Definitions by: Jorge Gonzalez <https://github.com/jorgegonzalez>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.2
+
+declare namespace pkgConf {
+    type AnyJson = boolean | number | string | null | JsonArray | JsonMap;
+    interface JsonArray extends Array<AnyJson> { }
+    interface JsonMap {
+        [key: string]: AnyJson;
+    }
+
+    interface Options {
+        // Directory to start looking up for a package.json file.
+        // Default: process.cwd()
+        cwd?: string;
+        // Default config.
+        defaults?: object;
+        // Skip package.json files that have the namespaced config explicitly set to false.
+        skipOnFalse?: boolean;
+    }
+
+    // Returns the config.
+    function sync(namespace: string, options?: Options): JsonMap;
+    // Pass in the config returned from any of the above methods.
+    // Returns the filepath to the package.json file or null when not found.
+    function filepath(config: JsonMap): string | null;
+}
+
+// Returns a Promise for the config.
+declare function pkgConf(namespace: string, options?: pkgConf.Options): Promise<pkgConf.JsonMap>;
+
+export = pkgConf;

types/pkg-conf/pkg-conf-tests.ts

@@ -0,0 +1,6 @@
+import pkgConf = require('pkg-conf');
+
+pkgConf('name'); // $ExpectType Promise<JsonMap>
+const config = pkgConf.sync('bugs'); // $ExpectType JsonMap
+pkgConf.filepath(config); // $ExpectType string | null
+config.url; // $ExpectType AnyJson

types/pkg-conf/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "pkg-conf-tests.ts"
+    ]
+}

types/pkg-conf/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }