Remove invalid releases automatically (#466)

Automatically remove empty releases or releases which are released in the future, regardless of the product.

Also refactored a bit releasedata.py to use better names and clarify types.

releases/libreoffice.json

@@ -1,27 +1,5 @@
 {
-  "releases": {
-    "7.6": {
-      "name": "7.6"
-    },
-    "7.5": {
-      "name": "7.5"
-    },
-    "7.4": {
-      "name": "7.4"
-    },
-    "7.3": {
-      "name": "7.3"
-    },
-    "25.2": {
-      "name": "25.2"
-    },
-    "24.8": {
-      "name": "24.8"
-    },
-    "24.2": {
-      "name": "24.2"
-    }
-  },
+  "releases": {},
   "versions": {
     "25.8.0.1": {
       "name": "25.8.0.1",
@@ -233,7 +211,7 @@
     },
     "24.2.0.2": {
       "name": "24.2.0.2",
-      "date": "2024-01-16"
+      "date": "2024-01-15"
     },
     "24.2.0.1": {
       "name": "24.2.0.1",
@@ -409,7 +387,7 @@
     },
     "7.4.2.1": {
       "name": "7.4.2.1",
-      "date": "2022-09-24"
+      "date": "2022-09-23"
     },
     "7.4.1.2": {
       "name": "7.4.1.2",
@@ -425,7 +403,7 @@
     },
     "7.3.6.1": {
       "name": "7.3.6.1",
-      "date": "2022-08-20"
+      "date": "2022-08-19"
     },
     "7.3.5.2": {
       "name": "7.3.5.2",
@@ -509,7 +487,7 @@
     },
     "7.3.0.1": {
       "name": "7.3.0.1",
-      "date": "2021-12-23"
+      "date": "2021-12-22"
     },
     "7.2.5.1": {
       "name": "7.2.5.1",
@@ -585,7 +563,7 @@
     },
     "7.1.4.2": {
       "name": "7.1.4.2",
-      "date": "2021-06-18"
+      "date": "2021-06-17"
     },
     "7.0.6.2": {
       "name": "7.0.6.2",
@@ -989,7 +967,7 @@
     },
     "5.4.7.1": {
       "name": "5.4.7.1",
-      "date": "2018-04-14"
+      "date": "2018-04-13"
     },
     "6.0.2.1": {
       "name": "6.0.2.1",
@@ -1225,7 +1203,7 @@
     },
     "5.2.0.1": {
       "name": "5.2.0.1",
-      "date": "2016-06-23"
+      "date": "2016-06-22"
     },
     "5.1.4.1": {
       "name": "5.1.4.1",
@@ -1269,7 +1247,7 @@
     },
     "5.1.1.1": {
       "name": "5.1.1.1",
-      "date": "2016-02-12"
+      "date": "2016-02-11"
     },
     "5.1.0.3": {
       "name": "5.1.0.3",
@@ -1341,7 +1319,7 @@
     },
     "5.0.0.5": {
       "name": "5.0.0.5",
-      "date": "2015-08-08"
+      "date": "2015-08-07"
     },
     "4.4.5.2": {
       "name": "4.4.5.2",
@@ -1485,7 +1463,7 @@
     },
     "4.3.1.2": {
       "name": "4.3.1.2",
-      "date": "2014-08-30"
+      "date": "2014-08-29"
     },
     "4.3.1.1": {
       "name": "4.3.1.1",
@@ -1729,7 +1707,7 @@
     },
     "3.6.3.2": {
       "name": "3.6.3.2",
-      "date": "2012-11-09"
+      "date": "2012-11-08"
     },
     "3.6.2.2": {
       "name": "3.6.2.2",