Fix error TS2497 on import * as X from 'md5': (#15584)

* Add support for es6 import syntax

* Remove bad test name

* Remove old test from tsconfig

types/md5/index.d.ts

@@ -1,15 +1,18 @@
 // Type definitions for md5 v2.1.0
 // Project: https://github.com/pvorb/node-md5
-// Definitions by: Bill Sourour <https://github.com/arcdev1>
+// Definitions by: Bill Sourour <https://github.com/arcdev1>, Cameron Crothers <https://github.com/jprogrammer>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference types="node" />
 
 /**
  * js function for hashing messages with MD5
- * 
+ *
  * @param {(string | Buffer)} message - a string or buffer to hash
  * @returns {string} the resultant MD5 hash of the given message
  */
-declare function main(message: string | Buffer): string;
-export = main;
+declare function md5(message: string | Buffer): string;
+
+declare namespace md5 {}
+
+export = md5;

types/md5/tsconfig.json

@@ -19,4 +19,4 @@
         "index.d.ts",
         "md5-tests.ts"
     ]
-}
+}