Update package name and repo url

Author: s0

.changeset/fair-cats-swim.md

@@ -0,0 +1,10 @@
+---
+"@changesets/ghcommit": minor
+---
+
+Migrating package to @changesets namespace
+
+Ownership of the repository has moved from https://github.com/s0/ghcommit
+to https://github.com/changesets/ghcommit. As part of this we're also moving the
+NPM package to the @changesets namespace. No functional changes have happened,
+so this can be a drop-in replacement for `@s0/ghcommit`.

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@s0/ghcommit",
+  "name": "@changesets/ghcommit",
   "version": "1.2.1",
   "private": false,
   "description": "Directly change files on github using the github API, to support GPG signing",
@@ -16,7 +16,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/s0/ghcommit.git"
+    "url": "https://github.com/changesets/ghcommit.git"
   },
   "exports": {
     ".": {