Use the Reading info official Lume plugin

We used to use `reading_time` from the experimental Lume plugins
repository (https://github.com/lumeland/experimental-plugins) to show
an estimate of the reading time needed for a post. While this
experimental plugin still exists in that repo, now it is available as
an official Lume plugin (https://lume.land/plugins/reading_info/), and
therefore we are switching to it.

_components/postDetails.njk

@@ -5,7 +5,7 @@
   {% else %}
     <p>Not yet published</p>
   {% endif %}
-  <p>{{ readingTime.minutes or "???" }} minutes</p>
+  <p>{{ readingInfo.minutes or "???" }} minutes</p>
 </div>
 <div class="tags">
   {% if tags | length %}

_config.ts

@@ -1,7 +1,7 @@
 import lume from "lume/mod.ts";
 import metas from "lume/plugins/metas.ts";
 import slugifyUrls from "lume/plugins/slugify_urls.ts";
-import readingtime from "lume-experimental-plugins/reading_time/mod.ts";
+import readingInfo from "lume/plugins/reading_info.ts";
 import markdownItConfig from "./_util/markdown-it-config.ts";
 import blogAutodescriptor from "./_util/plugins/blog-autodesc.ts";
 import capitalize from "./_util/plugins/capitalize.ts";
@@ -23,7 +23,7 @@ site.use(metas())
   .use(slugifyUrls())
   .use(capitalize())
   .use(inlineHighlight())
-  .use(readingtime())
+  .use(readingInfo())
   .use(blogAutodescriptor())
   .use(plaintextMeta());
 

deno.json

@@ -5,7 +5,6 @@
     "serve": "deno task lume -s"
   },
   "imports": {
-    "lume/": "https://deno.land/x/[email protected]/",
-    "lume-experimental-plugins/": "https://raw.githubusercontent.com/lumeland/experimental-plugins/main/"
+    "lume/": "https://deno.land/x/[email protected]/"
   }
 }