Add migration docs (#583)

website/docs/v5-to-v6.md

@@ -0,0 +1,24 @@
+---
+id: v5-to-v6
+title: v5 to v6 Migration Guide
+---
+
+v6.0.0 Migration Guide
+
+> FYI: v6 drops support for Node 10 and 12. If you need support for versions of Node that have reached EOL, please use v5.
+
+## Rule definition change
+
+[`name-format`](https://npmpackagejsonlint.org/docs/en/rules/format/name-format) was updated the use `validate-npm-package-name`. See [#537](https://github.com/tclindner/npm-package-json-lint/pull/537) for more details.
+
+## TypeScript Support
+
+v6 is completely written in TypeScript. The Node.js API is fully typed for easier development.
+
+## Documentation site (website)
+
+The website has been upgraded to Docusaurus v2 (beta). Versioning support has been removed in this release. All docs can now be found in `/website/docs`.
+
+## Additional changes
+
+Please see the [release notes](https://github.com/tclindner/npm-package-json-lint/releases/tag/v6.0.0) for additional changes introduced in v6.0.0.

website/sidebars.json

@@ -18,6 +18,7 @@
       "related-projects"
     ],
     "Migration Guides": [
+      "v5-to-v6",
       "v4-to-v5",
       "v3-to-v4",
       "v2-to-v3",