Add nano-md5_v1.x.x (#1844)

* Add nano-md5_v1.x.x

* Remove toHex function

* Fix default imports and add changed String class

* Add test for default import

definitions/npm/nano-md5_v1.x.x/flow_v0.65.x-/nano-md5_v1.x.x.js

@@ -0,0 +1,12 @@
+class ExtendedString extends String {
+  toHex: () => string;
+}
+
+declare module "nano-md5" {
+  declare module.exports: {
+    (utf8_string: string): string;
+    fromBytes (bytes_string: string): ExtendedString;
+    fromUtf8 (utf8_string: string): ExtendedString;
+    crypt (password: string, settings: string): string;
+  }
+}

definitions/npm/nano-md5_v1.x.x/test_nano-md5_v1.x.x.js

@@ -0,0 +1,10 @@
+import md5 from "nano-md5";
+
+// $ExpectError: accept only strings
+md5(6);
+
+const encoded: string = md5('some-string');
+
+md5.fromUtf8('hello').toHex();
+md5.fromBytes('hello').toHex();
+md5.crypt('hello', '$1$01234567');