This biggest features of this release are:

• Completely redesigned and snazzy Windows installer, thanks to @gilbertsoft
• Support for most versions of both MySQL and MariaDB (instead of just 10.1 and 10.2 of MariaDB) (docs)
• ddev launch command launches a browser with project in it.

Smaller issues:

• Don't allow ddev export-db to start up project and get startup intermingled with database dump.
• Fix commands not shown when outside project directory (and not listed in bash autocomplete)
• Improvements to ddev delete images (image cleanup utility)

Installation/Upgrade

See the installation instructions for details, but it's easy:

• Please stop all projects first, this does no harm: ddev poweroff
• If you have custom configuration, especially pinned image specifications in your .ddev/config.yaml, please remove it for now.
• macOS Homebrew and Linux Linuxbrew (ddev-edge channel only): brew install drud/ddev-edge/ddev or just brew upgrade drud/ddev-edge/ddev ). (You may need a brew update for homebrew to find the new release.)
• Windows: Use choco upgrade -y --pre ddev to get this one, or download the ddev_windows_installer below.
• And anywhere, you can just download the tarball or zipball, untar or unzip it, and place the executable in your path where it belongs.

Key changes since v1.11.2:

7fcae60 Fix nightly build - config.yaml left with unusable mariadb version (#1923)
7eb347d Allow mariadb_version 5.5, 10.0/1/2/3/4 and mysql 5.5/6/7 and 8.0, fixes #1870, fixes #1627 (#1874)
4edb8d0 [FEATURE] Rewrite Windows installer from scratch, fixes #1840 (#1880)
ed0e874 Remove obsolete drud_s3 tests; the support is still in there (#1921)
6434229 Don't allow export-db if project not started, fixes #1892 (#1915)
2ce0fe9 Fix missing commands when outside directory, fixes #1872 (#1917)
be95d88 Bump versions: drush to 8.3.1, node to 12.x in web container, fixes #1907 (#1909)
aa84156 [TASK] Combine all TYPO3_CONF_VARS into one recursively merged array (#1759)
70a8b0d Ignore dot files and make command files executable, fixes #1822 (#1861)
cd302a0 Minor fix to TestTimezoneConfig, tests only (#1903)
c15e9a6 Docs inventory: Minor URL fixes to docs (#1900)
8d9749a Minor docs changes to pacify readthedocs (#1899)
a509531 Readthedocs improvements, debugging, fixes #1841 [skip ci][ci skip] (#1868)
369bcc2 Added links to ddev-contrib for some extra services and old PHP [ci skip][skip ci] (#1891)
85fcf65 Make sure CAROOT exists, fixes #1848 (#1896)
f222969 Make solr name lookup refer exclusively to the solr container in this project (#1897)
1bdcde3 Use much simpler TYPO3 trustedHostsPattern (#1835)
f9af3b6 Add "ddev launch" command, fixes #910 (#1862)
c9b948a Improve exec hook output/behavior, fixes #1818, fixes #1765 (#1860)
bbe07a2 Add sqlite3 to webserver image (#1875)
a2c1841 More robust initial cert for ddev-router (#1873)
781d6de Remove trailing extraneous spaces (#1883)
efff4f0 Use nsis from linuxbrew (3.04) instead of from apt-get (ancient) (#1884)