Change repository link to GitHub mirror in npm package file

CHANGELOG

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.0.3 - 2020-07-10
+
+### Changed
+
+  - Update source code repository in npm package to point to GitHub mirror. (The GitHub mirror is the public repository where we can accept issues and pull requests. [The canonical repository](https://source.small-tech.org/site.js/lib/auto-encrypt) is on our own server where we do not accept sign ups as we don’t want it to become yet another centralised host.)
+
 ## [2.0.2] - 2020-07-10
 
 ### Fixed

package.json

 {
   "name": "@small-tech/auto-encrypt",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "description": "Adds automatic provisioning and renewal of Let’s Encrypt TLS certificates with OCSP Stapling to Node.js https servers (including Express.js, etc.)",
   "keywords": [
     "let's encrypt",
@@ -25,7 +25,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "https://source.small-tech.org/site.js/lib/auto-encrypt.git"
+    "url": "https://github.com/small-tech/auto-encrypt.git"
   },
   "scripts": {
     "test": "PEBBLE_VA_NOSLEEP=1 PEBBLE_WFE_NONCEREJECT=0 QUIET=true tape 'test/**/*.js' | tap-spec",