Add Pelican (#2130)

* Add Pelican

python cms

* change http by https and simplify detection

* fix false-positive

src/apps.json

@@ -7110,6 +7110,15 @@
       },
       "website": "http://panvision.de/Produkte/Content_Management/index.asp"
     },
+    "Pelican": {
+      "cats": [
+        1
+      ],
+      "implies": "Python",
+      "icon": "pelican.png",
+      "html": "powered by <a href=\"[^>]+getpelican\\.com",
+      "website": "https://blog.getpelican.com/"
+    },
     "PDF.js": {
       "cats": [
         19