postcss-less: Update for v4.0 (DefinitelyTyped#49672)

* postcss-less: Update for v4.0

The only change in this version is to bump the dependency on postcss
to ^8.1.2.

* postcss-less: add ES2018.Promise

The type declarations for postcss 8.x require this.

* postcss-less: Set target: ES5.

The type definitions for postcss 8.x require this.

* postcss-less: Add self to authors.

* postcss-less: Set minimum TypeScript version: 3.7.

The type definitions for postcss 8.x require this.

See: microsoft/TypeScript#33939

* postcss-less: Update tests for postcss 8.x.

types/postcss-less/index.d.ts

@@ -1,7 +1,9 @@
-// Type definitions for postcss-less 3.1
+// Type definitions for postcss-less 4.0
 // Project: https://github.com/shellscape/postcss-less
 // Definitions by: Masafumi Koba <https://github.com/ybiquitous>
+//                 Daniel Cassidy <https://github.com/djcsdy>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// Minimum TypeScript Version: 3.7
 
 import * as postcss from 'postcss';
 

types/postcss-less/package.json

@@ -1,6 +1,6 @@
 {
   "private": true,
   "dependencies": {
-    "postcss": "^7.0.32"
+    "postcss": "^8.1.2"
   }
 }

types/postcss-less/postcss-less-tests.ts

@@ -1,4 +1,4 @@
-import postcss = require('postcss');
+import postcss from 'postcss';
 import less = require('postcss-less');
 
 const lessCode = `

types/postcss-less/tsconfig.json

@@ -1,8 +1,10 @@
 {
     "compilerOptions": {
         "module": "commonjs",
+        "target": "ES5",
         "lib": [
-            "es6"
+            "es6",
+            "ES2018.Promise"
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,