schedule: update graphic, add dates for Node.js 19 and 20 (#723)

README.md

@@ -9,6 +9,8 @@
 | [16.x][] | **Active LTS**      | [Gallium][] | 2021-04-20     | 2021-10-26       | 2022-10-18        | 2024-04-30                |
 | [17.x][] | **Current**         |             | 2021-10-19     | -                | 2022-04-01        | 2022-06-01                |
 | 18.x     | **Pending**         |             | 2022-04-19     | 2022-10-25       | 2023-10-18        | 2025-04-30                |
+| 19.x     | **Pending**         |             | 2022-10-18     | -                | 2023-04-01        | 2023-06-01                |
+| 20.x     | **Pending**         |             | 2023-04-18     | 2023-10-24       | 2024-10-22        | 2026-04-30                |
 
 Dates are subject to change.
 

schedule.json

@@ -101,5 +101,17 @@
     "maintenance": "2023-10-18",
     "end": "2025-04-30",
     "codename": ""
+  },
+  "v19": {
+    "start": "2022-10-18",
+    "maintenance": "2023-04-01",
+    "end": "2023-06-01"
+  },
+  "v20": {
+    "start": "2023-04-18",
+    "lts": "2023-10-24",
+    "maintenance": "2024-10-22",
+    "end": "2026-04-30",
+    "codename": ""
   }
 }