Release v4.0.12 (mdn#13721)

* Bump version to v4.0.12

* Add release notes (mostly generated)

* Fix heading levels

Prepare release v4.0.11 (mdn#13547)

* Bump version to v4.0.11

* Add release date

* Add release note for mdn#12879

* Add release note for mdn#13424

* Add release note for mdn#13479

* Add release note for mdn#13486

* Add release note for mdn#13523

* Hoist from previous release

* Add stats

* Copyedit

* Fix order

Release v4.0.10 (mdn#13404)

* Bump version to v4.0.10

* Hoist known issues

* Add release note for mdn#13260

* Add release note for mdn#13278

* Add release note for mdn#13373

* Add release note for mdn#13388

* Add release stats and date

* Add RFC for release notes

Release v4.0.9 (mdn#13262)

* Bump version to v4.0.9

* Set release date

* Add release note for mdn#12795

* Add release note for mdn#13006

* Add release note for mdn#13136

* Add release note for mdn#13076

* Add release note for mdn#13216

* Add release note for mdn#11924

* Add release note for mdn#13143

* Undo list of one item

* Hoist known issues

* Add stats

* Fix compare link

Release v4.0.8 (mdn#13122)

* Bump version to v4.0.8

* Add release note for mdn#12934

* Add release note for mdn#13085

* Add release note for mdn#12975

* Add release note for mdn#12951

* Hoist known issue

* Add stats

* Fix diff link

Prepare release v4.0.7 (mdn#12936)

* Bump version to v4.0.7

* Set release date

* Add release note for mdn#12824

* Add release note for mdn#11909

* Add release note for mdn#12818

* Add release note for mdn#12832

* Add release note for mdn#12836

* Hoist known issues

* Add stats

* Add link to new data guideline

Prepare release v4.0.6 (mdn#12823)

* Bump version to v4.0.6

* Add release note for mdn#12094

* Add release note for mdn#12367

* Add release note for mdn#12462

* Add release note for mdn#12490

* Add release note for mdn#12565

* Add release note for mdn#12632

* Add release note for mdn#12638

* Add release note for mdn#12639

* Add release note for mdn#12703

* Add release note for mdn#12718

* Add release note for mdn#12723

* Add release note for mdn#12768

* Add release note for mdn#12770

* Add release note for mdn#12772

* Add release note for mdn#12794

* Add release note for mdn#12796

* Add release note for mdn#12813

* Add stats and hoist known issues

Prepare release v4.0.5 (mdn#12543)

* Bump version to v4.0.5

* Bump known issues

* Add release note for mdn#12417

* Add release note for mdn#12454

* Add release note for mdn#12417

* Add release note for mdn#12346

* Add release note for mdn#12455

* Add release note for mdn#12518

* Add release note for mdn#11630

* Add release note for mdn#12300

* Add release note for mdn#12552

* Add release stats

* Add release date

* Fix a typo

Prepare release v4.0.4 (mdn#12433)

* Bump version to v4.0.4

* Add release note for mdn#12335

* Add release note for mdn#12366

* Add release note for mdn#12376

* Add release note for mdn#12383

* Add release note for mdn#12403

* Simplify list of removals

* Set release date

* Add stats

Prepare release v4.0.3 (mdn#12342)

* Bump version to v4.0.3

* Hoist known issues

* Add release note for mdn#12230

* Add release note for mdn#12276

* Add release note for mdn#12185

* Add release stats

* Add release date