Add languages elm, izh, nog (#131)

They appear in translatewiki's local configuration,
but not here in language-data. The data about all of these
is stable enough to be here.

Co-authored-by: Niklas Laxström <niklas.laxstrom@gmail.com>

data/language-data.json

@@ -979,6 +979,13 @@
             ],
             "Ελληνικά"
         ],
+        "elm": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "Eleme"
+        ],
         "eml": [
             "Latn",
             [
@@ -1695,6 +1702,13 @@
         "iu": [
             "ike-cans"
         ],
+        "izh": [
+            "Latn",
+            [
+                "EU"
+            ],
+            "ižoran keel"
+        ],
         "ja": [
             "Jpan",
             [
@@ -2717,6 +2731,13 @@
             ],
             "คำเมือง"
         ],
+        "nog": [
+            "Cyrl",
+            [
+                "EU"
+            ],
+            "ногайша"
+        ],
         "nov": [
             "Latn",
             [
@@ -5621,6 +5642,7 @@
             "sr-cyrl",
             "vep",
             "mn",
+            "izh",
             "vot",
             "cu"
         ],