Update roadmap after 0.5 release

roadmap.html

@@ -9,48 +9,56 @@
 <div>
 
 <h1>Roadmap</h1>
-<p>The roadmap defines the project direction. Priorities are tracked by <a href="https://github.com/neovim/neovim/milestones">milestones</a>.
-
-   <ul>
-   <li>Version numbers (<code>0.1</code>, <code>0.2</code>, <code>0.2.1</code>, …) track production releases.
-       <ul>
-         <li>The next upcoming version has a target date.</li>
-       </ul>
-   </li>
-   <li><a href="https://github.com/neovim/neovim/milestone/6">backlog</a>
-       holds low-priority items.</li>
-   <li><a href="https://github.com/neovim/neovim/milestone/9">unplanned</a>
-       holds zero-priority items (no feasible path to completion).</li>
-   </ul>
-
+<p>This roadmap gives an overview over the project direction. A detailed list of features planned or under consideration can be found in the <a href="https://github.com/neovim/neovim/projects">project boards</a>; priorities are tracked by <a href="https://github.com/neovim/neovim/milestones">milestones</a>:
+<ul>
+  <li>Version numbers (<code>0.1</code>, <code>0.2</code>, <code>0.2.1</code>, …) track production releases. The next upcoming version has a target date.</li>
+  <li><a href="https://github.com/neovim/neovim/milestone/6">backlog</a>
+    holds low-priority items.</li>
+  <li><a href="https://github.com/neovim/neovim/milestone/9">unplanned</a>
+    holds zero-priority items (no feasible path to completion).</li>
+</ul>
 </p>
 
+<p>Note that all of these are tentative and can be changed, moved, or dropped at any time.</p>
+
 <h2>Next</h2>
 
-<h3><a href="https://github.com/neovim/neovim/milestone/19">0.5</a></h3>
+<h3><a href="https://github.com/neovim/neovim/milestone/25">0.5.x</a></h3>
 <ul>
-  <li>Lua <em>remote plugin</em> host</li>
-  <li>Lua user-config: <code>init.lua</code></li>
-  <li>Treesitter syntax engine <a href="https://github.com/neovim/neovim/issues/11724">#11724</a></li>
-  <li><a href="https://github.com/Microsoft/language-server-protocol">LSP</a> client for code navigation, refactoring</li>
-  <li>Extended marks (text properties, decorations, virtual text)</li>
+  <li>Lua API improvements</li>
+  <li>LSP support improvements (v3.16 spec coverage, configuration)</li>
 </ul>
 
-<h3>0.6</h3>
+
+<h3><a href="https://github.com/neovim/neovim/milestone/11">0.6</a></h3>
 <ul>
+  <li>Tree-sitter integration (highlighting, folds)</li>
   <li>Better file-change detection</li>
+  <li>Unified diagnostics API</li>
 </ul>
 
-<h3>Future/Long-term</h3>
+<h3>0.7+</h3>
 <ul>
+  <li>TUI as a remote UI (<code>$NVIM</code>, <code>--remote</code>)</li>
+  <li>Externalized UI: window layout events, <code>ext_statusline</code></li>
+  <li>Lua remote plugin host</li>
   <li>Embed Neovim everywhere</li>
-  <li>Externalized UI: window layout events</li>
-  <li>Syntax API: allow clients to query and define syntax groups, text attributes</li>
 </ul>
 
 
 <h2>Completed</h2>
 
+<p>Here are the headline features of the previous releases; for details see the corresponding release notes.</p>
+
+<h3><a href="https://github.com/neovim/neovim/milestone/19">0.5</a></h3>
+<ul>
+  <li><a href="https://neovim.io/doc/lua-resources/">Expanded Lua API and user config</a> (<code>init.lua</code></li>)
+  <li><a href="https://neovim.io/doc/lsp">Built-in Language Server Protocol (LSP) support</a></li>
+  <li><a href="https://neovim.io/doc/treesitter">Tree-sitter integration</a> (experimental)</li>
+  <li>Decorations API improvements: extmarks, virtual text, highlights</li>
+</ul>
+
+
 <h3><a href="https://github.com/neovim/neovim/milestone/21?closed=1">0.4</a></h3>
 <ul>
   <li>Lua "stdlib"</li>