version: Updates version after 11.0 release.

.github/ISSUE_TEMPLATE/2_bug_report.md

@@ -11,8 +11,8 @@ labels: ["bug"]
 **Zulip Server and web app version:**
 
 - [ ] Zulip Cloud (`*.zulipchat.com`)
+- [ ] Zulip Server 11.x
 - [ ] Zulip Server 10.x
 - [ ] Zulip Server 9.x
-- [ ] Zulip Server 8.x
-- [ ] Zulip Server 7.x or older
+- [ ] Zulip Server 8.x or older
 - [ ] Other or not sure

api_docs/changelog.md

@@ -18,6 +18,11 @@ clients should check the `zulip_feature_level` field, present in the
 /register`](/api/register-queue) responses, to determine the API
 format used by the Zulip server that they are interacting with.
 
+## Changes in Zulip 12.0
+
+Feature levels 421-424 reserved for future use in 11.x maintenance
+releases.
+
 ## Changes in Zulip 11.0
 
 **Feature level 421**

docs/overview/changelog.md

@@ -1,12 +1,21 @@
 # Version history
 
-This page contains the release history for the Zulip Server 11.x stable
-release series. See the [current Zulip changelog][latest-changelog]
-for newer release series, or the [commit log][commit-log] for an
-up-to-date list of all changes.
+This page contains the release history for the Zulip server. See also
+the [Zulip release lifecycle](../overview/release-lifecycle.md).
 
-See also the [Zulip release
-lifecycle](../overview/release-lifecycle.md).
+## Zulip Server 12.x series (development)
+
+This section is an incomplete draft of the release notes for the next
+major release, and is only updated occasionally. See the [commit
+log][commit-log] for an up-to-date list of all changes.
+
+## Zulip Server 12.0
+
+_Unreleased_
+
+### Upgrade notes for 12.0
+
+- None yet.
 
 ## Zulip Server 11.x series
 
@@ -4987,6 +4996,7 @@ _Released 2015-10-19_
 This section links to the upgrade notes from past releases, so you can
 easily read them all when upgrading across multiple releases.
 
+- [Draft upgrade notes for 12.0](#upgrade-notes-for-120)
 - [Upgrade notes for 11.0](#upgrade-notes-for-110)
 - [Upgrade notes for 10.0](#upgrade-notes-for-100)
 - [Upgrade notes for 9.0](#upgrade-notes-for-90)

docs/production/postgresql-support-table.md

@@ -9,3 +9,4 @@
 | 9.x                  | 12, 13, 14, 15, 16               |
 | 10.x                 | 13, 14, 15, 16, 17               |
 | 11.x                 | 14, 15, 16, 17                   |
+| 12.x (unreleased)    | 14, 15, 16, 17                   |

version.py

@@ -1,6 +1,6 @@
 import os
 
-ZULIP_VERSION = "11.0"
+ZULIP_VERSION = "12.0-dev+git"
 
 # Add information on number of commits and commit hash to version, if available
 zulip_git_version_file = os.path.join(
@@ -34,7 +34,7 @@ DESKTOP_WARNING_VERSION = "5.9.3"
 # new level means in api_docs/changelog.md, as well as "**Changes**"
 # entries in the endpoint's documentation in `zulip.yaml`.
 
-API_FEATURE_LEVEL = 421
+API_FEATURE_LEVEL = 425
 
 # Bump the minor PROVISION_VERSION to indicate that folks should provision
 # only when going from an old version of the code to a newer version. Bump