Add package smoothing (#2230)

* Added smoothing package

* Added package smoothing

* Removed duplicate definition of smoothing package

Co-authored-by: Paul Norrie <paul.m.norrie@gmailcom>
Co-authored-by: Miran <narimiran@disroot.org>

packages.json

@@ -26146,6 +26146,18 @@
     "license": "GPL-3.0-or-later",
     "web": "https://git.sr.ht/~xigoi/matext"
   },
+  {
+    "name": "smoothing",
+    "url": "https://github.com/paulnorrie/smoothing",
+    "method": "git",
+    "tags": [
+      "math",
+      "statistics"
+    ],
+    "description": "Smoothing functions for Regression and Density Estimation",
+    "license": "GPL-3.0-or-later",
+    "web": "https://github.com/paulnorrie/smoothing"
+  },
   {
     "name": "blarg",
     "url": "https://github.com/squattingmonk/blarg",