Merge pull request #3956 from github/update-supported-enterprise-server-versions

Update supported GitHub Enterprise Server versions

Author: mbg

CHANGELOG.md

@@ -4,7 +4,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
-No user facing changes.
+- _Upcoming breaking change_: Add a deprecation warning for customers using CodeQL version 2.20.6 and earlier. These versions of CodeQL were discontinued on 1 July 2026 alongside GitHub Enterprise Server 3.16, and will be unsupported by the next minor release of the CodeQL Action. [#3956](https://github.com/github/codeql-action/pull/3956)
 
 ## 4.37.0 - 08 Jul 2026
 

lib/entry-points.js

@@ -1 +1 @@
-{"maximumVersion": "3.22", "minimumVersion": "3.16"}
+{"maximumVersion": "3.22", "minimumVersion": "3.17"}

src/api-compatibility.json

@@ -272,17 +272,17 @@ const CODEQL_MINIMUM_VERSION = "2.19.4";
 /**
  * This version will shortly become the oldest version of CodeQL that the Action will run with.
  */
-const CODEQL_NEXT_MINIMUM_VERSION = "2.19.4";
+const CODEQL_NEXT_MINIMUM_VERSION = "2.20.7";
 
 /**
  * This is the version of GHES that was most recently deprecated.
  */
-const GHES_VERSION_MOST_RECENTLY_DEPRECATED = "3.15";
+const GHES_VERSION_MOST_RECENTLY_DEPRECATED = "3.16";
 
 /**
  * This is the deprecation date for the version of GHES that was most recently deprecated.
  */
-const GHES_MOST_RECENT_DEPRECATION_DATE = "2026-04-09";
+const GHES_MOST_RECENT_DEPRECATION_DATE = "2026-07-01";
 
 /** The CLI verbosity level to use for extraction in debug mode. */
 const EXTRACTION_DEBUG_MODE_VERBOSITY = "progress++";