[typo3] Add release automation

Using tags misses all ELTS releases, which are relevant for ELTS-only release cycles.

Important changes:

- very old v3 and v4 releases completely dropped except for 3.3.0, and 3.5.0.
- We track only as far back as v7, so dropping v4 and earlier should be fine.
- 7.0.1 and 9.3.2 are missing, which is okay because both are superseded.

Fixes #92.

src/typo3.py

@@ -0,0 +1,21 @@
+import json
+from common import endoflife
+
+PRODUCT = "typo3"
+URL = "https://get.typo3.org/api/v1/release/"
+
+print(f"::group::{PRODUCT}")
+releases = {}
+
+response = endoflife.fetch_url(URL)
+data = json.loads(response)
+for v in data:
+    if v['type'] != 'development':
+        date = v["date"][0:10]
+        releases[v["version"]] = date
+        print(f"{v['version']}: {date}")
+
+endoflife.write_releases(PRODUCT, dict(sorted(
+    releases.items(), key=lambda x: list(map(int, x[0].split(".")))
+)))
+print("::endgroup::")