Is there any place about releases policies described?

I checks dependencies updates each week. Today as usual I checked dependencies, and I was surprised that video.js version has been jumped from 8.12.0 up to 8.16.1

-    "video.js": "^8.12.0",
+    "video.js": "^8.16.1",

In releases page I see, that all other intermediate versions are marked as "pre-release":

• 8.12.0 — release
• 8.13.0 — pre-release
• 8.14.0 — pre-release
• 8.14.1 — pre-release
• 8.15.0 — pre-release
• 8.16.0 — pre-release
• 8.16.1 — release
• 8.17.0 — pre-release

What is going on here? Why is that so?